Jonathan Seals’ popular tool CoolBooter, which allows jailbroken devices to boot two different iOS firmwares, has been updated once more. The app version now stands at Beta 11, with the command line tool at 0.6.

After a tweet from the creator categorically stated that CoolBooter development had been abandoned, many no doubt thought that we had seen the last of this nifty and powerful utility. However, barely a fortnight had passed before the statement was reneged upon, and work resumed on the project.

Since then, the updates have been coming with some regularity, as follows:

9th May: Beta 7
Adds backup and restore and improves reliability on older firmwares.

4th June: Beta 8
Fewer bootloops, maybe no more bootloops?

5th June: Beta 9
Including better iOS 7 support.

14th June: Beta 10
iPhone 4s is now fully supported.

As you can see, support has been added thick and fast, and as of Beta 8, the developer believes all issues requiring a restore to fix (bootloops, getting stuck in recovery, etc) have been eliminated, which is an important milestone for such a low-level tool.

Below are the changelogs for today’s releases, which seem to be bringing the tool to an impressive state of completion:

CoolBooter App 1.0 Beta 11
This update adds a custom data partition size option.

CoolBooter CLI 0.6
iPhone 4s support, more stability, and a custom data partition size option.

The CLI update brings it back to feature parity with the app version, which it had lagged behind in recent releases, whilst the addition of a custom data partition size to both tools is a welcome addition. Given the small storage capacities of many of these legacy devices (CoolBooter is a 32-bit only utility), the ability to manually control how much space to allocate to the secondary OS has been a long time coming, and will make the experience a lot smoother for many users. For the app version of CoolBooter, this new functionality can be found directly within the interface, as shown in my test screenshots below:

If you’d like to play around with CoolBooter, simply add the following Cydia repo to download the tool, and then run the app:

Although it’s now very stable, I recommend testing it only on secondary devices, and remember, 32-bit only.

For the more adventurous among you, I’ve also previously put together a guide on how to dual-boot your device with the command line version of CoolBooter, which you can try out if you like.

Let me know how it goes in the comments, and I’ll keep you up to date with any big new CoolBooter happenings.

  • M P

    64bit support PLZ

    • Joaquim Barbosa

      Probably won’t be coming any time soon unfortunately. This uses kloader, which is 32-bit only. For 64-bit futurerestore/prometheus is the closest thing.

  • erkut ter

    Useless things. Useless coders. We have no jailbreak for ios 9 – 10. So we can’t use this. First, try to make a jailbreak.

    • Digitalfeind

      ^useless person. Because it’s not suitable for you it should not be suitable for those that would like this??

    • Rahimo

      First: making such an app is a very genius thing and it is a very hard work .. and very useful .. so it’s not USELESS
      Second: There is a jailbreak on iOS 9 and 10 (Not all versions .. but some versions are jailbreakable! so .. maybe it’s your fault for not having a jailbreak on your device!!) .
      Third: Show us your efforts! those “useless coders” need support and money …


    • Joaquim Barbosa

      32-bit devices do have a jailbreak for iOS 9, they can downgrade from iOS 10 to iOS 9, and they can use this tool to boot any older iOS they like, all of which have jailbreaks, so it’s not particularly useless. Also, calling someone useless for any code except a jailbreak seems a little misguided.

  • Dougy

    I have an iPod touch 5th gen. I got iOS 7.1.2 jailbreak on it. Can I update to iOS 9.3.3 & jailbreak it??

    • Juschan

      No you cant update to 9.3.3 only to the latest available

    • Joaquim Barbosa

      If you have properly saved blobs for iOS 9 you can use the re-restore bug to move to iOS 9.

  • TheShade247

    I had iPhone 5 on 8.1 and caused bootloop back in may, and now I’m stuck on 10.3.1 shitty deals 🙁

    • Joaquim Barbosa

      Unlucky! It is a beta I guess. If you have any iOS 9 blobs you can use the re-restore bug to get back to iOS 9.

  • Pavel Kalyugin

    Simply amazing achieved iOS 6.1.3 on my iPad4. I wonder can I use such version of ios further to get SHSH blobs to use futher with futurerestore + libipatcher?