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Current version: v1.4.4 Candela is TechEmpower's accessible resource app. Browse free tech guides, connect with our peer-support Discord, dial 211 for local help — and listen to any of it through a neural-voice audiobook engine that reads everything aloud.
Under the hood: twenty-seven fiction backends (Royal Road, GitHub, RSS / Atom feeds, local EPUB folders, local PDF files, on-device OCR, self-hosted Outline wikis, Memory Palace, Project Gutenberg, LibriVox, Archive of Our Own, Standard Ebooks, Wikipedia, Wikisource, Radio with 30k+ stations, Notion, Hacker News, arXiv, PLOS, Discord, Telegram, Palace Project, Slack, Matrix, Readability web articles); three in-process voice families (Piper, Kokoro, KittenTTS) with optional Azure HD cloud voices; AI chat per fiction across seven LLM providers with cross-fiction memory, function calling, and multi-modal image input; built for Android phones, tablets, and Wear OS.
📦 Latest release: v1.4.4 — Cloud sync fix (for real) — v1.4.3 provisioned local.properties on runners but the workflow still copied from the pre-rebrand storyvox path — which only existed on katana. Builds scheduled on familiar or ubox0 silently fell back to the PLACEHOLDER app ID.
📖 Source: github.com/techempower-org/candela · License: GPL-3.0 · Site: candela.techempower.org
- Getting started — Install, sign-in, first listen
- Fiction sources — All twenty-seven backends and their setup paths
- AI chat — Seven providers, grounding, recaps, sessions
- Voices — Piper, Kokoro, KittenTTS, Azure HD, voice library
- Voice catalog — Flat reference of all catalog entries
- Settings reference — Every knob explained
- Architecture — Forty modules, plugin seam, data flow
- Building from source — Toolchain, gradle, signing
- Troubleshooting — Sideload, voice download, BYOK setup, OAuth flow
Cloud sync fix (for real). v1.4.3 provisioned local.properties on runners but the workflow still copied from the pre-rebrand storyvox path — which only existed on katana. Builds scheduled on familiar or ubox0 silently fell back to the PLACEHOLDER app ID.
- Update CI workflow
local.propertiesmaterialization path fromstoryvoxtocandelaso all runners (not just katana) pick upINSTANTDB_APP_ID. (#1344) - Create persistent
local.propertieson ubox0 (was missing entirely).
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Cold launch 6.7 s → 0.8 s on Galaxy Tab A7 Lite (v0.5.46 — R8 + Baseline Profile +
isDebuggable=false). - Full PCM cache series — streaming-tee, cache-hit playback, background pre-render, Settings UI, status icons (v0.5.47–v0.5.49).
- Twelve a11y findings closed (v0.5.43) — high-contrast brass-on-near-black theme, reduced-motion fold-in, TalkBack pacing.
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Nav settled — four-tab dock
{Playing · Library · Voices · Settings}(v0.5.50 final, after v0.5.40 restructure). - Cross-device InstantDB sync (v0.5.39+) — library, follows, positions, bookmarks, pronunciation, encrypted secrets.
- KittenTTS lightest-tier voice family (v0.5.36 — #119).
Start here
Using Candela
- Fiction sources
- Reading & library
- Export & extras
- Voices
- Voice catalog
- AI chat
- Cloud sync
- Accessibility
- Settings reference
- Troubleshooting
Developer
Project