Got the X4. Put CrossPoint on it. Works like a charm. The http server accessible over wifi makes transferring books extremely simple. (Shame on the Kindle for locking everything down.) This is proof-of-concept that a microcontroller is more than enough for something like an e-reader.
I have a Kindle and a Kobo. They are sturdy devices. But the X4 is the one that is a genuine e-reader. Would not get it as my one and only e-reader though as you tend to miss the size and backlight of the larger ones.
What would I want from future iterations?
- backlight even if it compromises on battery a bit
- a bit more DPI
Everything else is good enough.
coredog64 3 minutes ago [-]
It was probably a decade ago, but I used to have this extremely cheap e-reader that ran off AA batteries, used a monochrome LCD screen (no lighting) and was based on a microcontroller. If you let the batteries die and waited too long to replace them, you had to reflash the software on it. I think it only handled mobi format, but it might have been epub.
tmottabr 13 minutes ago [-]
There are rumors they will release a V2 Pro version with touch and backlight in the second half of this year.
They also have already announced the S4 that is basically the same device, a bit ticker with touch and backlight and running android.
kstrauser 1 hours ago [-]
I'm with you on every bit. I love my Kobo Libra 2 and it lives on my nightstand table. It's an excellent reader. The X4 with CrossPoint is an alright reader, but I've been chewing through books on my morning commute because it fits in my jacket pocket and I can have it out on the train without bumping into other people.
It's not the best reader I own, but it's the best reader I have on me at any given moment when I'm not laying in bed.
sieve 39 minutes ago [-]
> It's not the best reader I own, but it's the best reader I have on me at any given moment
This. The form factor is almost the right one for an e-reader. The battery lasts for weeks. It is so open that you could probably write your own firmware for it based on CrossPoint or similar for your own needs.
Needs some iterative development while ruthlessly culling requests for random features.
criddell 54 minutes ago [-]
Does your reading position sync up between the two devices?
ihowlatthemoon 38 minutes ago [-]
Not the commenter you were replying to, but I have both a Kindle and a X4. No, it does not, but searching for a unique enough phrase (just two or three words) on the current page gets you there fast enough.
crtasm 20 minutes ago [-]
If you install koreader on the kobo, crosspoint on the x4 and create a free koreader sync account (or host your own sync sever): yes - but on the x4 you need to manually trigger syncs
Alternatively if you wish to stick with the stock Kobo reader app it is possible to sync via a https://grimmory.org/ instance
0cf8612b2e1e 22 minutes ago [-]
As someone who also juggles multiple readers, I find it easier to have a different book per device. Otherwise I would waste too much time trying to sync between the two.
pluralmonad 54 minutes ago [-]
Not being lighted is what has kept me from trying it. If they do add lighting I hope it is a front light and not a back light. Hard to beat a front lit e-ink display for reading. Bonus points for warmth settings.
HumblyTossed 1 hours ago [-]
All of this. It's a solid device. I like it. It won't replace my Kobo, but it has it's place in my tech lineup.
Will buy the next one if it has a light.
flowerbreeze 7 minutes ago [-]
Oh it comes with custom firmware? This is very interesting. I would love to be able to modify some UX and I am sorry, but I need to get the following out of my head. All the e-readers I have had have made it impossible to turn off features like:
1. Selection highlighting... I never use highlighting when reading fiction, but whenever I am not careful enough when turning a page, it'll go crazy with highlighting. Flashing screen, need to close the popup that has added the highlight, removing the highlight again etc.
2. Most of the time I don't want to click on a word to find out its meaning. It's sometimes useful, but I'd rather have it under menu to temporarily enable it. Same reason as before. My e-readers tend to prefer this often enough rather than taking the "next page" action.
3. Make "previous page" be small and not-under-my-finger. Ideally let me choose its position in a fairly precise way.
4. Easy access to accidental "scroll to page 900". I generally don't want it to happen and to be honest, I struggle to think of anybody who does. It can live in a single tiny faraway menu that is impossible to accidentally tap.
5. Swipe-left for previous page. It almost never happens when I want it to happen, so I'd rather turn it off.
In fact, I would love my e-book reader to have no gestures at all. Pretty please let me turn them off! All I want is a tiny button top-right or top-left corner for "open menu", a "previous page" in the other corner and otherwise "tap anywhere" is "next page".
Personal request to any e-book reader software engineers. Please save the position in the book to persistent storage on each page change or every few. At least if the e-reader has any chance of crashing at all, which has been the case with all the ones I have ever had. Yes, not all of them save it...
That's not to say that all the above things are universally bad UX. I think many of these are very useful, if reading non-fiction or having a different goal when reading such as learning a new language. It's just that they are less than brilliant if the goal is to read a book for entertainment in the most comfortable way possible with the fewest things going wrong by accidental taps.
my_throwaway23 8 minutes ago [-]
I've been eyeing the Xteink devices for a while now. They fit all the boxes - small, cheap, physical buttons - a basic reading utility. However, since there's no support for DRM, I'm worried either I won't be able to find books I want to read (what if I want the latest from my favourite author?), or I'll eventually run out.
Might be a tiny tinsy bit of purchase-anxiety as well - it'll be my first e-ink device after all, but what do I know...
criddell 39 minutes ago [-]
I've looked at this device and I wonder how good the layout engine is. Screenshots never show text with any hyphenation going on which makes me wonder if it even supports hyphenation.
One of the images on the Amazon page for the reader has somebody holding one beside their laptop and if you look at the screen, it looks terrible. There are even words jammed together ("would be most suitable forthe job").
I love that it has physical buttons though. My reader is the Kindle Oasis and the buttons are one of my favorite features of the device. The Oasis layout engine and typography are both pretty good and I wonder if the X4 would end up feeling like a big downgrade.
bouk 33 minutes ago [-]
The alternative firmwares give you a lot more options in this, stock is OK in layout
For those who can afford it, I can recommend the Boox Note for the ebook reader. It comes with full Android, so you are not limited to books but can read news, Hacker News, and other doomscrolling that fills the Internet.
In a pinch, you can also connect it to a Bluetooth keyboard and use it as a development terminal. SSH terminal looks gorgeous on e-ink.
BeetleB 1 hours ago [-]
> It comes with full Android, so you are not limited to books but can read news, Hacker News, and other doomscrolling that fills the Internet.
That sounds like an anti-feature. When I first bought an ereader over 15 years ago, I intentionally chose one that didn't support Wifi for this very reason. I want it primarily for reading documents.
But then again, I guess Boox is meant more to be a tablet than an ereader.
Also, genuinely curious - does having Android reduce the time between recharges? As an example, I read a whole book over 7 days, and didn't need to charge my Kobo (and modern Kobo battery life is not great).
I want Kobo to release an 8" color, but don't know if they ever will. I was considering Boox as an alternative, but I worry about battery life and Android. I wonder if my worry is misplaced.
criddell 51 minutes ago [-]
A problem with Boox that some here care about is their non-compliance with the GPL. Their devices run modified GPL software and they have (AFAIK) refused to release their modifications.
dewey 1 hours ago [-]
Sounds like the opposite of what I want for my ebook reader.
imzadi 1 hours ago [-]
If you are looking for a more affordable option, I have a Musnap Ocean C. It's a little bare bones, but still pretty good. It's a color e-ink display and you can get an optional pen that lets you take notes. I only use it for books and documents, though. It's the best option under $300 that I have found if you want something that is color and can take hand written notes.
koziserek 1 hours ago [-]
the point of having an e-ink reader (at least for me and anybody I know who actively use such device), is to read things, so keeping doomscrolling options is *not* an advantage..
broabprobe 37 minutes ago [-]
I love the X3, light enough I can carry it around without noticing it. Battery lasts forever. I don't feel the need for a backlight at all, I love how simple this is.
I know people favor the X4 for the usb-c, and I'm all for universal charging cables. But in my experience the usb port is often the first component to fail in something like this. And that seems super annoying to replace. The pogo pins on the other hand are unlikely to fail. And the cable is not proprietary, you can get compatible cables on Amazon/etc.
ApolloFortyNine 2 hours ago [-]
I got one, it's pretty cool that it's small enough to just magnet to the back of your phone. If your someone who needs to use a large font on their ereader to read its certainly not for you, but the screen size is good enough for regular sized text.
It's also cool that it's chip is just an ESP32.
WillAdams 57 minutes ago [-]
I would like to see a phone case which this inserts into --- bonus points if there's a way to use it as a status display for the phone for use in bright/direct sunlight.
naravara 39 minutes ago [-]
The obvious innovation is to just make the back of the phone case an eInk display. No need for all the bulk when you can merely have an app on your phone that controls the case-display and the phone can output whatever reader app you want to it like a companion/IoT device.
Or it can be a little bit bulkier and just be a dedicated ereader that is shaped like a phone case. Either way works.
senorcrab 1 hours ago [-]
I've been using it for about 6 months. Very, very good - especially paired with anna's archive.
IT IS VERY FRAGILE! The eink screen on my first broke while in my backpack. The company is generous, I bought a new one and they gave 35% off and included all accessories (reading light, case, extra protectors). Highly recommend.
aanet 46 minutes ago [-]
I've been eyeing the Xteink Reader but cannot decide between the X4 (4.7" diag) and X3 (3.7" diag).
FWIW, the X3 requires a pogo pin cable, while the X4 requires a standard USB-C.
Anybody got any recommendations?
Thanks!
cbushko 36 minutes ago [-]
I picked the X4 over X3 because the usb-c is convenient for charging (which you barely need to do)
I love it and use it every day.
ihowlatthemoon 34 minutes ago [-]
Go for the X4. Neither supports USB file transfer, so having USB-C charging is convenient without additional things to worry about. Bigger screen is also better if you're a fast reader. The faster you read, the more your reading speed is limited by the page turn speed.
5555624 20 minutes ago [-]
The X4. I always have a USB-C cable handy; so, i can charge it in the bedroom, at y desk, etc.
zabi_rauf 57 minutes ago [-]
Love my X4. Shameless plug, I also built an iOS/Android app to manage books and also send web articles over to Crosspoint
Thank you. I'm not the biggest fan of the Crosspoint web interface, so I'll definitely give this a try.
dfee 40 minutes ago [-]
i bought a pocketbook era lite recently, and it's a bit too locked down for my tastes - though usable. i kinda just want a dumb appliance. actually, i want a linux appliance. this probably sounds very "not productized" to a PM, but 99% of what's on there i don't want: a book store, games, etc.
i wish there was just an SDK for building apps (i'll vibe code towards a great epub experience, i'm fine with that). and, i'm fine plugging it in via USB or even SCPing files over wifi. but, it sends my reading progress to a server every time i use it which is highly annoying and concerning. however, the form factor is sufficient.
i guess i was hoping it'd be more aligned with steam's direction with their steam machine.
camel-cdr 36 minutes ago [-]
> i wish there was just an SDK for building apps (i'll vibe code towards a great epub experience, i'm fine with that)
I've had the X3 for a month and I love it. It's so small I forget it's in my pocket and have almost washed it a couple times. I'm working on custom firmware for it, so I ordered an X4 when they had the 20% off sale to test on there too.
timw4mail 45 minutes ago [-]
As a crazy person with both, I have mixed feelings between them.
In favor of the X3:
- Crisper text
- Whiter display
- Slightly better battery life
- Top-mounted power button (subjective)
In favor of the X4:
- Larger display
- Plain USB-C charging
- Slightly better custom firmware support
- Backward and forward button on the same side (subjective)
automathematics 59 minutes ago [-]
link the custom firmware!
somesortofthing 2 hours ago [-]
I got the X4 and liked it enough that I used it a ton even though it turned out to be too big to Magsafe onto my phone. In fact, I liked it enough that I also got the X3 on sale so I can use it the way I originally intended to use the X4.
Hijacking … i have some random e-ink displays (from a bought product)… there seem to be 6 lines to the mcu (or 7, havent measured). Any 2026 tips on approaches to reverse engineer this to run on an arbitrary hobby mcu like esp32? Oh the mcu seems to be a WinnerMicro W100 Series MCU (arm m3)
dmitrygr 1 hours ago [-]
there are 4 or 5 command sets, you can safely try them all. for that few wires, it'll be spi
hxii 1 hours ago [-]
I’ve been looking at these for a while, hoping the custom firmwares for it will become more popular, as I was considering getting this for my six-year-old.
The disabled usb is certainly a bummer. I wonder how they disabled it though – is there a hardware difference?
cbushko 34 minutes ago [-]
Crosspoint is very popular and very easy to flash onto the device.
Locking and preventing flashing of firmware only happened in China.
crtasm 13 minutes ago [-]
This page mentions international models, but seems it's still possible to flash them in any case
As someone who has resisted buying an e-reader for years because I "prefer physical books", I finally purchased a Kobo Clara BW and love it. Even though I usually only read one book at a time, having my whole library in a small form factor is really wonderful.
nosioptar 1 hours ago [-]
The no USB flashing doesn't appear to be the case if you get it straight from OEM. It is a bit pricier than amazon.
I love this thing and I use it a lot more than my kindle and my kobo (with koreader). I really like the form factor and the fact that goes out of sleep almost instantly and goes to sleep equally as fast. It seeps battery. It is perfect the way it is.
crimsdings 1 hours ago [-]
Have the X4, the size is perfect - I always have it in my pocket and can read a view pages whenever I am waiting for something. Reduced my phone usage / doom scrolling nonsense with it. Best 50€ spent in a long time.
I skimmed over the project a bit. It seems quite ambitious to aim to reimplement epub, considering that means supporting HTML, CSS, SVG and JavaScript.
Is there a ebook format that isn't just build arround the concept of a webbrowser?
timw4mail 39 minutes ago [-]
While I agree in terms of modern browser expectations (and books absolutely should not need JavaScript), I think books in HTML makes a lot of sense. HTML was meant for sharing text documents, after all.
lisnake 32 minutes ago [-]
HTML and CSS is enough for 99% percent of epubs, and that's the only subset of epub standards that Crosspoint tries to support
camel-cdr 25 minutes ago [-]
Isn't HTML and CSS already a huge surface to support, unless you are happy with a subset?
sieve 1 hours ago [-]
epub is overkill for a vast majority of books.
A format that only supported
- headings
- paragraphs
- emphasis (bold/italics)
- bullets
- inline images
is good enough. A simple container with a TOC pointing to text blocks/files within it that can be processed very cheaply.
Unfortunately, with something like epub, you lose all the simplicity because you want to support every single feature even if rarely used.
kandros 1 hours ago [-]
been using on the back of my phone for a few months, my most satisfying hardware purchase in a long time
automathematics 59 minutes ago [-]
what phone does it fit on? I have the X3 coming today for this very reason. The x4 is just too big and the magnets misplaced to fit on any phone I own
galleywest200 1 hours ago [-]
I love my X4. I throw it in my backpack or pocket when I take the dog to the park and read a few pages when we sit in the shade.
I have a Kindle and a Kobo. They are sturdy devices. But the X4 is the one that is a genuine e-reader. Would not get it as my one and only e-reader though as you tend to miss the size and backlight of the larger ones.
What would I want from future iterations?
- backlight even if it compromises on battery a bit
- a bit more DPI
Everything else is good enough.
They also have already announced the S4 that is basically the same device, a bit ticker with touch and backlight and running android.
It's not the best reader I own, but it's the best reader I have on me at any given moment when I'm not laying in bed.
This. The form factor is almost the right one for an e-reader. The battery lasts for weeks. It is so open that you could probably write your own firmware for it based on CrossPoint or similar for your own needs.
Needs some iterative development while ruthlessly culling requests for random features.
Alternatively if you wish to stick with the stock Kobo reader app it is possible to sync via a https://grimmory.org/ instance
Will buy the next one if it has a light.
Personal request to any e-book reader software engineers. Please save the position in the book to persistent storage on each page change or every few. At least if the e-reader has any chance of crashing at all, which has been the case with all the ones I have ever had. Yes, not all of them save it...
That's not to say that all the above things are universally bad UX. I think many of these are very useful, if reading non-fiction or having a different goal when reading such as learning a new language. It's just that they are less than brilliant if the goal is to read a book for entertainment in the most comfortable way possible with the fewest things going wrong by accidental taps.
Might be a tiny tinsy bit of purchase-anxiety as well - it'll be my first e-ink device after all, but what do I know...
One of the images on the Amazon page for the reader has somebody holding one beside their laptop and if you look at the screen, it looks terrible. There are even words jammed together ("would be most suitable forthe job").
I love that it has physical buttons though. My reader is the Kindle Oasis and the buttons are one of my favorite features of the device. The Oasis layout engine and typography are both pretty good and I wonder if the X4 would end up feeling like a big downgrade.
I also built two quick hacks for it that people might like:
- https://github.com/rcarmo/bun-readlater-epub
- https://github.com/rcarmo/bun-opds-server
In a pinch, you can also connect it to a Bluetooth keyboard and use it as a development terminal. SSH terminal looks gorgeous on e-ink.
That sounds like an anti-feature. When I first bought an ereader over 15 years ago, I intentionally chose one that didn't support Wifi for this very reason. I want it primarily for reading documents.
But then again, I guess Boox is meant more to be a tablet than an ereader.
Also, genuinely curious - does having Android reduce the time between recharges? As an example, I read a whole book over 7 days, and didn't need to charge my Kobo (and modern Kobo battery life is not great).
I want Kobo to release an 8" color, but don't know if they ever will. I was considering Boox as an alternative, but I worry about battery life and Android. I wonder if my worry is misplaced.
I know people favor the X4 for the usb-c, and I'm all for universal charging cables. But in my experience the usb port is often the first component to fail in something like this. And that seems super annoying to replace. The pogo pins on the other hand are unlikely to fail. And the cable is not proprietary, you can get compatible cables on Amazon/etc.
It's also cool that it's chip is just an ESP32.
Or it can be a little bit bulkier and just be a dedicated ereader that is shaped like a phone case. Either way works.
IT IS VERY FRAGILE! The eink screen on my first broke while in my backpack. The company is generous, I bought a new one and they gave 35% off and included all accessories (reading light, case, extra protectors). Highly recommend.
FWIW, the X3 requires a pogo pin cable, while the X4 requires a standard USB-C.
Anybody got any recommendations?
Thanks!
I love it and use it every day.
https://crosspointsync.com/
i wish there was just an SDK for building apps (i'll vibe code towards a great epub experience, i'm fine with that). and, i'm fine plugging it in via USB or even SCPing files over wifi. but, it sends my reading progress to a server every time i use it which is highly annoying and concerning. however, the form factor is sufficient.
i guess i was hoping it'd be more aligned with steam's direction with their steam machine.
That seems to be what crosspoint-reader is: https://github.com/crosspoint-reader/crosspoint-reader
In favor of the X3:
- Crisper text
- Whiter display
- Slightly better battery life
- Top-mounted power button (subjective)
In favor of the X4:
- Larger display
- Plain USB-C charging
- Slightly better custom firmware support
- Backward and forward button on the same side (subjective)
The disabled usb is certainly a bummer. I wonder how they disabled it though – is there a hardware difference?
Locking and preventing flashing of firmware only happened in China.
https://crosspointreader.com/#unlock-tool
also: https://crosspointreader.com/unlocker
https://www.xteink.com/products/xteink-x4
https://github.com/crosspoint-reader/crosspoint-reader/relea...
Is there a ebook format that isn't just build arround the concept of a webbrowser?
A format that only supported
- headings
- paragraphs
- emphasis (bold/italics)
- bullets
- inline images
is good enough. A simple container with a TOC pointing to text blocks/files within it that can be processed very cheaply.
Unfortunately, with something like epub, you lose all the simplicity because you want to support every single feature even if rarely used.