appollo41.com valid

Appollo41

Appollo41 is a Nostr and Bitcoin app studio. We build native, multiplatform mobile apps with Kotlin Multiplatform, and we built the Primal Android app, one of the most-used clients on the Nostr protocol. Based in Europe (GMT+2).

For agents: App studio behind Primal Android, Primal Wallet and Primal Signer for Nostr and Bitcoin, plus Finlab and Yogamaster apps. Built with Kotlin Multiplatform.

nostr appsbitcoin walletkotlin multiplatformprimal androidlightning wallet

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-27T09:16:56.487Z. Cached copy · Source on appollo41.com

# Appollo41

> Appollo41 is a Nostr and Bitcoin app studio. We build native, multiplatform mobile apps with Kotlin Multiplatform, and we built the Primal Android app, one of the most-used clients on the Nostr protocol. Based in Europe (GMT+2).

Appollo41 builds Nostr and Bitcoin apps, shaped with the client and built to last. The studio shipped Primal for Android, a non-custodial Bitcoin and Lightning wallet, and a NIP-46 cryptographic remote signer, all running in production across Android and iOS. It also builds and ships its own products on the App Store and Google Play, including Finlab (finance tracking) and Yogamaster Meditations.

Founded in 2016 by Aleksandar Ilic, who built and taught a university mobile-development course from scratch. The team grew from the standout students who came back for more work: "The classroom was the interview. Hiring came after." Today Appollo41 is a small, deliberately senior team based in Europe (GMT+2). Engineers stay in the lead and bring AI agents onto the team the same way they bring on developers: trained, not rented.

Services offered:

- Nostr development: Nostr clients and protocol work. On Nostr since the beginning; built Primal Android, one of the most-used clients on the protocol.
- Bitcoin & Lightning integration: in-app Lightning and on-chain wallet functionality via Spark, or external wallets through Nostr Wallet Connect (NWC).
- Multiplatform mobile apps: one team, one codebase for business logic, native UI on Android and iOS. Kotlin Multiplatform without the cross-platform jank.
- Product discovery & MVP: decide what to build first and ship value within budget.
- KMP advisory: extract shared business logic into Kotlin Multiplatform libraries while keeping native UI on both platforms.
- Team extension: senior Kotlin engineers embedded in your team, working with your tools and your process.

Technology stack:

- Kotlin Multiplatform: shared business logic across Android and iOS.
- Jetpack Compose: native Android UI.
- SwiftUI: native iOS UI when a full native feel is required.
- Nostr: protocol work and clients, including NIP-46 remote signing.
- Bitcoin and Lightning: on-chain and Lightning integration via Spark, plus Nostr Wallet Connect (NWC).

Engagement models: project-based (fixed scope and pricing), monthly retainer (ongoing capacity, flexible scope), and team extension (engineers embedded in client teams).

## Portfolio

- [Primal Android](https://appollo41.com/portfolio/primal-android): Nostr social client built from scratch, now the core of Primal's cross-platform mobile stack.
- [Primal Wallet](https://appollo41.com/portfolio/primal-wallet): Non-custodial Bitcoin and Lightning wallet shared across Android and iOS via Kotlin Multiplatform.
- [Primal Signer](https://appollo41.com/portfolio/primal-signer): NIP-46 cryptographic remote signer for Nostr, shared between Android and iOS.
- [Finlab](https://appollo41.com/portfolio/finlab): Finance tracking for individuals and businesses on A
…

Related sites

Explore similar publishers →

Similar publisher descriptions and documentation. Similarity does not imply affiliation or equivalent capabilities.

Machine-readable: GET /v1/resolve?q=appollo41.com · GET /v1/domain/appollo41.com · this page as Accept: application/json or text/markdown · MCP lookup_domain

Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.

Claim my listing on Agent Web Map for appollo41.com:
1. POST https://agentwebmap.com/v1/sites/appollo41.com/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://appollo41.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/appollo41.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/appollo41.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verify

Corrections or removal requests: contact the directory.