The problem

Subscriptions renew quietly. Free trials convert, promo prices end, and a shared plan goes unpaid because nobody remembers whose turn it is. Most trackers fix this by asking for a bank login. Suby never asks for one.

What I built

A home screen that answers one question: what leaves my account in the next 30 days.
Reminders 1 to 7 days before each renewal.
Three ways in: add by name, import from a screenshot, or import a statement file.
Shared plans with a paid mark per person.
94 currencies, a calendar of upcoming charges, and home-screen widgets.
Everything stored on the device. Free, no ads. Premium is optional and adds encrypted cloud backup.

How it is built

One Kotlin Multiplatform codebase with Compose Multiplatform for the UI, shipped to both stores by one developer.

language: Kotlin
ui: Compose Multiplatform
targets: Android · iOS

More screens

Suby calendar showing October renewal dates and the remaining charges for the month — Calendar

Suby shared subscriptions with a Planet Fitness plan and the manage sharing action — Shared plans

Suby widget catalogue with sample spending, upcoming payments, calendar, trial and currency widgets — Widgets · scroll to explore

Shipping log

Nov 20261.8.0 Monthly spending plan, keypad sums, quick add from widgets and shortcuts, custom categories, app lock, daily-spending calendar, month-by-month trends.
Next2.0 In progress.

Version 1.8.0 and its release notes are from the App Store listing captured in the approved mockup on 12 November 2026. Suby 2.0 is the current work described in the brief, not a released store version.