Tiercel home

AI apps worth keeping.

Tiercel is an independent software company building AI apps people actually keep. Finly is the expense tracker you talk to. Investolio is the dividend tracker that works offline. We build AI apps with partners, too.

Live on iOS and Android

Finly Budget Expense Tracker

Finly is an AI expense tracker for iPhone and Android: say it, snap it, or import it, and it’s logged. No bank login.

App Store Google Play About Finly

In beta

Investolio

Investolio is a dividend tracker and portfolio app for iOS, Android and web: see what you own and what it will pay you next.

Ask about the beta About Investolio

How we build

Four habits behind every app we ship.

  1. AI that asks before it writes.

    Finly

    Finly's assistant proposes a change to your data. Nothing is saved until you confirm it.

    • Chat agent
    • Proposes a write
    • You confirm
    • Commit
    The confirm step

  2. Works offline, syncs when it can.

    Investolio

    Investolio reads from a cache on the device, so your portfolio opens without a connection.

    • On-device cache
    • Background sync
    • Fresh data
    See Investolio

  3. Free market data, built to hold up.

    Investolio

    Investolio runs its own small service over free sources, with a fallback for every path and an alarm on stale data.

    • Free sources
    • One service
    • Fallbacks
    • Freshness alarm
    Read how it works

  4. Receipts, statements, voice. One ledger.

    Finly

    Finly turns a photo, a PDF or a spoken sentence into the same draft transaction, for you to review.

    • Photo, PDF or voice
    • Structured draft
    • You review
    • Ledger
    How receipts work

Journal

Engineering notes from building AI apps.

Read the journal
  1. Receipt scanning in productionOne vision-model call reads the receipt. A surprising amount of code around it makes the result something you can trust. How Finly's scanner works, and where it broke.
  2. Confirm before you write: a tool-calling assistant for moneyTelling a model to ask first is not enforcement. How Finly's chat assistant is built so that nothing is written until you tap confirm.
  3. A market-data service with no API keysInvestolio gets its prices, dividends and exchange rates from free, keyless sources, with a small service of ours in front and a fallback behind every path.
  4. Shipping an Expo app with self-hosted OTA updatesJavaScript changes to Finly reach phones without a store review, through an update server we host. How the setup works, and the rules that keep it safe.

Partner with us

We build ours. We can help build yours.

We design and build AI-powered iOS, Android and web apps with partners, from first prototype to App Store launch.

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