# Sumi vs Zeronoon

The clearest difference is update cadence: Sumi at every 5 days against Zeronoon's fortnightly. Zeronoon's advantage is device support (3 vs 1) and iOS requirement (14.0.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Sumi sells 3 in-app purchases, starting at $5.99 per month and Zeronoon sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Sumi ships an update every 5 days, Zeronoon fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sumi | Zeronoon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/sumi-deep-work-focus/id6448810281/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free | — |
| Size | 10 MB | 58 MB |
| Requires iOS | 16.0 | **14.0.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [David Park](https://appshunter.io/developer/1686485618) | [ZERONOON LIMITED](https://appshunter.io/developer/1775736649) |

## What reviewers say

### 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 |


### Zeronoon

[App page](https://appshunter.io/ios/app/zeronoon/id6737965713)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zeronoon Pro Monthly | $4.99 | per month |
| ZeronoonPro Premium Yearly | $47.49 | per year |


## Frequently asked questions

### Is Sumi free?

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

### Is Zeronoon free?

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

### Do Sumi or Zeronoon have ads?

Neither Sumi nor Zeronoon shows ads.

### Which is updated more often, Sumi or Zeronoon?

Sumi ships an update every 5 days, and Zeronoon fortnightly. Most recently, Sumi was updated on November 3, 2026 and Zeronoon on October 30, 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.*