# Flip Timer vs Sumi

The clearest difference is review sentiment: Flip Timer at 100% against Sumi's 0%. Flip Timer also leads on rating (5.0 vs 3.0) and in-app purchases (none vs 3). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Sumi sells 3 in-app purchases, starting at $5.99 per month. Flip Timer asks for nothing beyond the download.

Flip Timer holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of Flip Timer's written reviews are positive against 0% of Sumi's.

Flip Timer ships an update weekly, Sumi every 5 days. The most recent releases landed on August 12, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Flip Timer | Sumi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/flip-timer-offscreen-focus/id1543547997/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/sumi-deep-work-focus/id6448810281/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free | Free |
| Size | 4 MB | 10 MB |
| Requires iOS | 16.1 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniil Kim](https://appshunter.io/developer/1648048774) | [David Park](https://appshunter.io/developer/1686485618) |

## What reviewers say

### Flip Timer

[App page](https://appshunter.io/ios/app/flip-timer-offscreen-focus/id1543547997)

This app uses your phone's proximity sensor to minimize distractions by activating a timer when placed face down. It helps you concentrate on tasks and reminds you to take breaks. Strict mode prevents early interruptions.

**Highlights:** Proximity sensor activation, Blocks notifications and apps, Strict mode for discipline, Flashlight notification, Customizable timer length

**In-app purchases:** none


### Sumi

[App page](https://appshunter.io/ios/app/sumi-deep-work-focus/id6448810281)

This app helps you reduce phone usage by setting timers for breaks. It alerts you if you touch or move your device during the break, aiming to boost productivity and mental well-being.

**Highlights:** Timed phone breaks, Movement alerts, Productivity enhancement, Mental health improvement, Simple interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sumi Pro Monthly | $5.99 | per month |
| Sumi Pro Annual | $24.99 | per year |
| Sumi Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Flip Timer free?

Flip Timer is free to download, with no in-app purchases.

### Is Sumi free?

Sumi is free to download, with in-app purchases available.

### Which has better reviews, Flip Timer or Sumi?

Flip Timer is rated higher. Flip Timer averages 5.0 out of 5 from 2 ratings, while Sumi averages 3.0 from 2 ratings.

### Do Flip Timer or Sumi have ads?

Neither Flip Timer nor Sumi shows ads.

### Which is updated more often, Flip Timer or Sumi?

Flip Timer ships an update weekly, and Sumi every 5 days. Most recently, Flip Timer was updated on August 12, 2026 and Sumi on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*