# Surutto vs Unki

The clearest difference is in-app purchases: Unki at none against Surutto's 1. Unki also leads on update cadence (weekly vs fortnightly). Surutto's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Surutto sells 1 one-off in-app purchase. Unki asks for nothing beyond the download.

Surutto ships an update fortnightly, Unki weekly. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Surutto | Unki |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 40 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [KAZUNORI HARADA](https://appshunter.io/developer/1886720483) | [Daisaku Mori](https://appshunter.io/developer/1892935206) |

## What reviewers say

### Surutto

[App page](https://appshunter.io/ios/app/surutto-bowel-movement-log/id6760903882)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Surutto Pro (One-Time) | $4.99 | one-time |


### Unki

[App page](https://appshunter.io/ios/app/unki-bowel-tracker/id6777927621)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Surutto free?

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

### Is Unki free?

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

### Do Surutto or Unki have ads?

Neither Surutto nor Unki shows ads.

### Which is updated more often, Surutto or Unki?

Surutto ships an update fortnightly, and Unki weekly. Most recently, Surutto was updated on October 4, 2026 and Unki on October 10, 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.*