Mobileread
best device for koreader
#1  mintwurm 10-15-2019, 05:47 AM
Hi,
I've recently stumbled over koreader and would very much like to start using it.
Problem is, my kindle has long been updated to a problematic firmware version. And before I risk bricking it, I would rather give it to someone in my family (demand is definitely there).
So I'm looking for a new ereader.

Since I would like to get a device with more than 6in screensize, candidates are the kobo libra h2o and the pocketbook inkpad 3.

As far as I can see, koreader is made mostly with kobo devices in mind. I would have already bought the libra, but potential PWM (forma apparently had it - huge no-go for me) is keeping me doubtful.

Can you help me with recommendations here?
How is the compatibility of koreader and pocketbook devices?
Anything I should be aware of?
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#2  JSWolf 10-15-2019, 05:51 AM
If PWM was an issue, you'd be reading a lot more people mentioning it as a problem. And nobody has mentioned PWM as a problem for the Libra.
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#3  mintwurm 10-15-2019, 07:28 AM
The problem with PWM is that you really can't see it. It is only measurable with special equipment.

Moreover, it's a very technical detail. I don't think the average customer is even aware of its existence.

Nevertheless, in susceptible people and depending on how it is implemented, it can cause eye-strain and headaches. This is definitely something that shouldn't be discarded as "can't see it, doesn't exist". Notebookcheck for example checks for PWM on every display they test. This is a huge topic.

Some people say that the Kobo Forma uses PWM. There's even a poll on this forum with 6 out of 51 participants saying that it causes eye-strain for them: https://www.mobileread.com/forums/po...ts&pollid=2051

I don't think the numbers are reliable. But it's something to keep in mind. Regarding the libra h2o, you're right, I couldn't find any complaints. But the device is barely out yet. I wonder what will turn up in time.

To clarify this, I used the chat option on the kobo website. They told me they would forward my question to the technical team and get back to me. Well, let's see ...
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#4  NiLuJe 10-15-2019, 11:08 AM
The Forma does use PWM, and, no, it's not an issue, but let's not go down that road again, please. If you need technical details, the exact frequency used has been confirmed and posted in the Kobo forum.

The Libra probably doesn't, as it's basically a Clara in hiding, and nobody ever complained about that on the Clara (not that anyone actually did with the Forma, despite making a lot of noise about it).

We lack actual developers with PocketBook devices, so, while it could be a great platform for us, it's plagued by a number of weird quirks no-one can really work on.
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#5  pazos 10-15-2019, 11:27 AM
Kobos are number one because they have good stock software and can install KOReader easily. The cervantes 4 is another good option if you want a 6" device JUST for KOReader (because stock reader sucks and isn't maintained anymore).

Android devices, on the other hand, are not exactly the best ones to run KOReader. Most of them will work but there are, usually, bloated with "bad"ware and Android itself has a few (I would say a lot) of quirks to run a "everything is a file" program like KOReader.

In short: get a Kobo.
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#6  Frenzie 10-15-2019, 05:47 PM
Quote NiLuJe
We lack actual developers with PocketBook devices, so, while it could be a great platform for us, it's plagued by a number of weird quirks no-one can really work on.
The quirks are arguably objectively quirkier than Kobo though. Weird custom touch protocol vs. goes to sleep after a second… Might be hard to call. Perhaps PB is more consistently quirky? :P

The Libra is promising when buying new, but you could also consider a used older Kobo. Post 2014 pretty much anything goes… depends a bit on what you're used to from that Kindle I suppose.
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#7  NiLuJe 10-15-2019, 05:58 PM
There's the whole InkView layer that I'm naively hoping would ideally hide the quirks away from us ;p.
Which, granted, may not always help us, as we often do things slightly closer to the metal than what InkView is designed for.

I *really* wouldn't recommend older Kobos (today, that is, unless you get them extremely cheap), though, stuff was all kinds of weird until Mk. 6 at the very earliest . Especially if you pit them against the matching Kindle generations.
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#8  Frenzie 10-16-2019, 08:04 AM
Used Kindles might be preferable in theory, but there you have firmware of no return issues, don't you?

Anyway, I just mean that if you bought a used H2O for € 50, for example (not sure what you mean by extremely cheap), imo you'd be getting an excellent device. I'm sure the same applies to a roughly equivalent Kindle. The Libra is € 180.

Of course if I'd already made up my mind and budgeted ~200 for the purpose then whatever.

For KOReader support definitely the Libra, but one question potentially worth asking is whether PocketBook has better build quality?
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#9  JSWolf 10-16-2019, 08:43 AM
Quote Frenzie
Used Kindles might be preferable in theory, but there you have firmware of no return issues, don't you?

Anyway, I just mean that if you bought a used H2O for € 50, for example (not sure what you mean by extremely cheap), imo you'd be getting an excellent device. I'm sure the same applies to a roughly equivalent Kindle. The Libra is € 180.

Of course if I'd already made up my mind and budgeted ~200 for the purpose then whatever.

For KOReader support definitely the Libra, but one question potentially worth asking is whether PocketBook has better build quality?
eInk Readers are generally of a similar build quality due to them using glass backed screens. There are some now with plastic backed screens such as the Kobo Forma. And yes, you will read about more Kobos getting broken then Pocketbook not because of build quality but because many more people have a Kobo and some are not all that careful (i.e., no case, put it in a bag with too much other stuff, etc.). Kindles break as well. Just look on eBay. You'll find some Readers for sale for parts because the screen is broken.
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#10  JSWolf 10-16-2019, 08:45 AM
Quote NiLuJe
I *really* wouldn't recommend older Kobos (today, that is, unless you get them extremely cheap), though, stuff was all kinds of weird until Mk. 6 at the very earliest . Especially if you pit them against the matching Kindle generations.
What's odd about mark 5 hardware such as the original H2O?
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