# Sumipon: Lock Screen To-Do — Quick tasks, red panda stamps

> Quick tasks, red panda stamps (iPhone/iPad app by Sang Huynh.)

- Source: https://appshunter.io/ios/app/sumipon-lock-screen-to-do/id6826714521 (this page in markdown: same URL + `.md`)
- Developer: [Sang Huynh](https://appshunter.io/developer/6816163922)
- Category: Productivity, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 22 MB
- Languages: American English, Japanese
- Released: 2026-10-30
- Data updated: 2026-10-31

## What is Sumipon?

Sumipon puts your to-do list where you already look: the lock screen.

Type a short task in seconds. The app opens with the cursor ready, and you can also start from Control Center, the Action button, or Siri ("Add a task").

LOCK SCREEN
- Lock screen widgets: a rectangular list with tap-to-stamp, a circular progress ring, and an inline line
- A list wallpaper image you can export, or update automatically with a Shortcuts automation (Set Wallpaper)
- Optional Live Activity for "today focus" on the lock screen

A note on iPhone limits: when the phone is locked, widget buttons work after Face ID unlock. That is an Apple rule, not something an app can change.

DONE MEANS DONE
Finish a task and Pon the red panda gives it a red 済 hanko stamp. Tasks you finish never come back by mistake. Made a mistake? Undo it. You can also reorder, rename, and delete with undo. The Stamp Book shows what you finished, and Pon levels up as you collect stamps.

PRIVATE AND SIMPLE
- Works offline
- No account, no data collected
- English and Japanese

FREE TO USE, ONE-TIME UNLOCK
The core to-do list and lock screen widgets are free. "Sumipon Pro" is a one-time purchase (no subscription) that unlocks all wallpaper styles, Live Activity, more than one list, and history export.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sumipon Pro | $5.99 | one-time |


## Is Sumipon safe?

Not enough ratings yet to assess Sumipon.

## Is Sumipon legit?

Sumipon: Lock Screen To-Do appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sumipon is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-30

No release notes.

## More apps by Sang Huynh

- [Hunker: Tornado Warning Alerts](https://appshunter.io/ios/app/hunker-tornado-warning-alerts/id6816467806)
- [RallyRound: Round Robin Maker](https://appshunter.io/ios/app/rallyround-round-robin-maker/id6816586509)
- [Inkroom: Tattoo Consent Forms](https://appshunter.io/ios/app/inkroom-tattoo-consent-forms/id6816634489)
- [Shine Route: Detailing App](https://appshunter.io/ios/app/shine-route-detailing-app/id6816637477)
- [Tension: Drum Tuner](https://appshunter.io/ios/app/tension-drum-tuner/id6816748198)
- [Timepie: Visual Routine Timer](https://appshunter.io/ios/app/timepie-visual-routine-timer/id6816946874)

All apps by Sang Huynh: https://appshunter.io/developer/6816163922

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*