# Sumi: Deep Work Focus — user reviews

> 2 indexed App Store user reviews of Sumi by David Park, rated 3.00/5 from 2 ratings.

- Source: https://appshunter.io/ios/app/sumi-deep-work-focus/id6448810281/reviews
- App overview in markdown: https://appshunter.io/ios/app/sumi-deep-work-focus/id6448810281.md
- Rating breakdown: 5★ 0 · 4★ 0 · 3★ 1 · 2★ 0 · 1★ 0

## Most critical reviews (2 lowest-rated)

### 3/5 — Doesn’t work

*2026-04-01*

Once your phone turns off from not using it or touching it then the timer stops

### 3/5 — Doesn’t work

*2025-06-16*

I like the concept a lot, but the moment you start a timer it ends because your phone is open…

**Developer response:** Hey! You have to put your phone flat on your table and press start. The app is designed so you can't touch our move your phone or it interrupts the timer.

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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 2026-08-11.*