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Thunder vs Interstellar: catalog facts
Thunder	Interstellar
Best for: Lemmy and PieFed users who want a native phone client	Best for: Lemmy, Mbin and PieFed users who want one app for all three
Free Free and open source.	Free Free and open source.
Android, iOS	Windows, Linux, Android
Supports both Lemmy and PieFed One codebase for iOS and Android All 3 strengths for Thunder Supports both Lemmy and PieFed One codebase for iOS and Android Open source and actively developed	Works with Mbin, Lemmy and PieFed in one app Cross-platform from a single Flutter codebase All 3 strengths for Interstellar Works with Mbin, Lemmy and PieFed in one app Cross-platform from a single Flutter codebase Open source with a published privacy policy
Mobile only, no desktop app Limited to Lemmy and PieFed rather than the wider fediverse	Smaller project with a modest contributor base Features depend on what each server type supports
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Thunder github.com/thunder-app/thunder play.google.com/store/apps/details apt.izzysoft.de/fdroid/index/apk/com.hjiangsu.thunder apps.apple.com/us/app/thunder-for-lemmy/id6450518497 Catalog checked September 24, 2026	Official website Full listing and sources Sources for Interstellar github.com/interstellar-app/interstellar play.google.com/store/apps/details apt.izzysoft.de/fdroid/index/apk/one.jwr.interstellar Catalog checked September 24, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.