Mobile apps across Nostr, Bitcoin, fintech, and construction.
What we shipped
Primal Android →
Nostr social client built from scratch, now the core of Primal's cross-platform mobile stack. Three years, active.
Kotlin · Jetpack Compose · KMP · Nostr · Bitcoin · Android
Primal Wallet →
Non-custodial Bitcoin and Lightning wallet shared across Android and iOS via Kotlin Multiplatform.
KMP · Bitcoin · Lightning · NWC · Android · iOS
Primal Signer →
NIP-46 cryptographic remote signer for Nostr, shared between Android and iOS.
KMP · Nostr · NIP-46 · Android · iOS
Capmo →
Offline-first Android app for the construction industry. Appollo41 contributed an embedded developer to Capmo's team.
Team Extension · Kotlin · Android · Offline-first · Construction
Yogamaster Meditations →
Guided meditation video and training programs, on iOS and Android. Built end to end as a partner product.
Kotlin · Compose Multiplatform · iOS · Android · Health & Wellness
Finlab →
Finance tracking for individuals and businesses, on Android, iOS, and the web. Appollo41's own product.
Kotlin · Compose Multiplatform · Android · iOS · Web · Fintech
Vertt+ →
Technical audit and stabilization for a Swiss ride-hailing platform.
Technical Audit · Full-Stack · Performance
Other work
Inspirock
Provided a developer for algorithm optimization at Inspirock, a travel planning platform used by 25M+ travelers annually. Later acquired by Klarna.