# Sumi vs Smart Noise Detector

The clearest difference is price: Sumi at Free against Smart Noise Detector's $0.99. Sumi also leads on update cadence (every 5 days vs every 3 months). Smart Noise Detector's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Sumi is free to download; Smart Noise Detector costs $0.99 up front. Sumi sells 3 in-app purchases, starting at $5.99 per month. Smart Noise Detector asks for nothing beyond the download.

Sumi ships an update every 5 days, Smart Noise Detector every 3 months. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sumi | Smart Noise Detector |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | Free | — |
| Size | 10 MB | 1 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [David Park](https://appshunter.io/developer/1686485618) | [YongShin Kwak](https://appshunter.io/developer/1846240980) |

## 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 |


### Smart Noise Detector

[App page](https://appshunter.io/ios/app/smart-noise-detector/id6761699505)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sumi free?

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

### Is Smart Noise Detector free?

Smart Noise Detector costs $0.99, with no in-app purchases.

### Do Sumi or Smart Noise Detector have ads?

Neither Sumi nor Smart Noise Detector shows ads.

### Which is updated more often, Sumi or Smart Noise Detector?

Sumi ships an update every 5 days, and Smart Noise Detector every 3 months. Most recently, Sumi was updated on October 7, 2026 and Smart Noise Detector on October 28, 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.*