# Stool Checker vs My Nikki

The clearest difference is update cadence: My Nikki at every 3 weeks against Stool Checker's every 6 weeks. My Nikki also leads on ratings volume (31 vs 9). Stool Checker's advantage is review sentiment (83% vs 73%) and iOS requirement (12.0 vs 18.0). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Stool Checker sells 4 one-off in-app purchases and My Nikki sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Stool Checker against 4.7 for My Nikki. Both are backed by a comparable volume of ratings — 9 and 31 respectively. Written reviews are what separate them: 83% of Stool Checker's written reviews are positive against 73% of My Nikki's.

Stool Checker ships an update every 6 weeks, My Nikki every 3 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | Stool Checker | My Nikki |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (9 ratings)](https://appshunter.io/ios/app/stool-checker/id542571748/reviews) | **[4.7 (31 ratings)](https://appshunter.io/ios/app/my-nikki/id1040960062/reviews)** |
| Number of ratings | 9 | **31** |
| Positive reviews | **82.6% of reviews** | 73.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 120 MB | 57 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ZAIZEN Co., Ltd.](https://appshunter.io/developer/380406945) | [AnySense Inc.](https://appshunter.io/developer/458572704) |

## What reviewers say

### Stool Checker

[App page](https://appshunter.io/ios/app/stool-checker/id542571748)

Track your bowel movements and monitor digestive health. Easily log entries, view historical data in a calendar, and add notes about your condition. Features include privacy locking and multi-account support.

**Highlights:** Log bowel movement times, Calendar view of records, Add text memos for condition, Privacy locking, Multi-account system

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ぷーちゃん | $0.99 | one-time |
| ブリリーナ | $0.99 | one-time |
| うんこさん | $0.99 | one-time |
| 広告非表示 | $2.99 | one-time |


### My Nikki

[App page](https://appshunter.io/ios/app/my-nikki/id1040960062)

This app allows users to privately record daily events, thoughts, and photos in a simple, cute digital journal. It offers password protection for privacy and organizes entries into a visually appealing album format.

**Highlights:** Daily event recording, Photo insertion (up to 10 per day), Calendar and list display, Password lock for privacy, Search function, Notification reminders

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | per month |
| Premium | $2.99 | per month |


## Frequently asked questions

### Is Stool Checker free?

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

### Is My Nikki free?

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

### Which has better reviews, Stool Checker or My Nikki?

My Nikki is rated higher. Stool Checker averages 4.7 out of 5 from 9 ratings, while My Nikki averages 4.7 from 31 ratings.

### Do Stool Checker or My Nikki have ads?

Both Stool Checker and My Nikki show ads.

### Which is updated more often, Stool Checker or My Nikki?

Stool Checker ships an update every 6 weeks, and My Nikki every 3 weeks. Most recently, Stool Checker was updated on October 26, 2026 and My Nikki on October 26, 2026.

---

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