Foreverse

BYOK · Custom API

Your keys, your models —
60+ providers, swappable anytime

Drop in the API keys you already own: OpenAI, Anthropic, Gemini, DeepSeek, xAI, plus any OpenAI- or Anthropic-compatible endpoint or self-hosted relay. Keys are AES-encrypted on device, requests go straight to the provider, you pay provider prices — the app never sees your key.

Download on the App StoreGet it on Google Play

Available for iPhone and iPad in selected regions outside mainland China. Not available on the mainland China App Store. Download help

See the reader
  • AES-encrypted · on-device only
  • Direct-to-provider requests
  • Text / image / speech / video routed separately
Phone · Models & services
Bring your own provider keys

Key in, ping tested, models toggled — thirty seconds

Switch providers on the left; paste the key, hit “Test” for a real round-trip latency, filter models by modality, and set defaults on the right. This iPad is a live prototype — every step is tappable.

Concept workbench · web demo (not the current Android tablet UI)

BYOK's security boundary, spelled out

  • On-device onlyKeys are AES-encrypted in secure storage on your phone — the app never uploads, logs, or sends them in telemetry.
  • Direct to providerRequests leave your phone for the apiHost you configured. No resale proxy in between; you pay provider list price.
  • Versioned endpointsapiHost carries the full version prefix, so any OpenAI / Anthropic style endpoint or self-hosted gateway works.
  • Transparent usageEvery request logs model, tokens, cache hits and cost into the API request record for audit anytime.

What “list price” means in numbers: the LLM API pricing table holds input / output / cache-read prices for 1,300+ models across 30 providers, and the AI reading cost calculator turns them into per-continuation and per-audiobook spend.

FAQ

Common questions

Which providers and endpoints are supported?

60+ presets including OpenAI, Anthropic, Google Gemini, DeepSeek, xAI, Mistral, Groq; any OpenAI- or Anthropic-compatible endpoint (including one-api / new-api relays) can join as a custom provider.

Is my API key ever uploaded?

No. Keys are AES-encrypted in on-device secure storage and requests go directly to the provider — Foreverse servers never touch your key.

How do I know a model actually works?

Every provider page has a Test button that probes the upstream directly, with distinct results for connected / invalid key / wrong host path / unreachable. Model lists support bulk-import from the provider, manual adds and removal, and default models are set per slot across text / vision / image / voice / video / embedding.

Can I use it without my own keys?

Where the official metered channel is available: built-in models bill per use (1 credit = $0.0001), and you can start official then switch to BYOK with your data intact. In builds/regions without it, bring your own key first.

Live on Android and iOS

Bring your own keys and take back the model choice.

Install it, import your books, and connect your own keys. Questions go straight to [email protected].

iPhone / iPad · App StoreAndroid · Google Play