FAQ
Is Kumo free?
Kumo is free to try during alpha. Long-term pricing and plans are documented on the Subscription & Quotas page.
Which emulators are supported?
See the full list on Supported Emulators.
Can I sync save files between different emulators?
Not yet. Support for syncing saves between compatible emulators, such as Sudachi and Eden or Azahar and Citra, is planned.
For now, you can use Android apps such as FolderSync if you want to mirror those files between emulator folders.
Why does Kumo ask for folder access?
On modern Android versions, emulator files are often inside protected paths (Android/data). Kumo uses Android's Storage Access Framework (SAF) so you can explicitly grant access to each emulator folder.
Does Kumo provide BIOS files?
No. Kumo does not include, bundle, or distribute BIOS files. BIOS files are generally copyrighted by their platform vendors and you are responsible for obtaining and using them legally.
For setup details, see Supported Emulators → BIOS import.
My save did not sync. What should I check first?
- Confirm device is online and sync is started.
- Confirm emulator folder access is still granted.
- Open Recent Changes and look for upload/download entries.
- Check account quota usage on Subscription & Quotas.
Does Kumo sync ROM files?
Yes, for supported emulators and configured paths. Kumo applies emulator-aware filtering so only relevant file types are synced.
ROMs for systems like GameCube, Wii, PSX, PS2, and Switch can be very large. If you want a lower profile setup, use Kumo for saves and use another tool such as Syncthing for ROM transfers.
Can I use Kumo on only one device?
Yes. Kumo is also useful on a single device because it gives you cloud backup for emulator data.
Is sync real-time?
Kumo performs a full sync on startup and when network comes back. It also uses push notifications so changes from another device are downloaded quickly.
What happens if two devices change the same file?
Kumo keeps versioned cloud history and preserves conflicting versions as separate conflict copies instead of overwriting data silently. Older versions are kept for 7 days, then removed automatically.
Can I use Kumo with Linux?
Linux support is planned.
How do I report a bug or request a feature?
Use the Feedback / Issues Form.