# セルフモニタリングダイアリー vs Simple Mood Log

The clearest difference is in-app purchases: セルフモニタリングダイアリー at none against Simple Mood Log's 2. セルフモニタリングダイアリー also leads on ads (none vs shown). Simple Mood Log's advantage is update cadence (every 3 days vs every 13 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Simple Mood Log sells 2 in-app purchases, starting at $0.99 per month. セルフモニタリングダイアリー asks for nothing beyond the download.

セルフモニタリングダイアリー ships an update every 13 months, Simple Mood Log every 3 days. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | セルフモニタリングダイアリー | Simple Mood Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/simple-mood-log/id6449779464/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 3 days** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 51 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASTEM/RI](https://appshunter.io/developer/354983137) | [NAOYA ONO](https://appshunter.io/developer/1530328146) |

## What reviewers say

### セルフモニタリングダイアリー

[App page](https://appshunter.io/ios/app/id1338741463)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Mood Log

[App page](https://appshunter.io/ios/app/simple-mood-log/id6449779464)

Easily track your daily mood fluctuations with this intuitive app. Record your feelings, add notes and activities, and gain insights through detailed weekly and monthly analysis graphs. It's designed for quick logging and comprehensive mood tracking.

**Highlights:** Daily mood recording, Memo and activity tagging, Add past data, Weekly/monthly analysis, Mood percentage graphs, Simple and easy to use

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $0.99 | per month |
| Support Developer | $0.99 | one-time |


## Frequently asked questions

### Is セルフモニタリングダイアリー free?

セルフモニタリングダイアリー is free to download, with no in-app purchases.

### Is Simple Mood Log free?

Simple Mood Log is free to download, with in-app purchases available.

### Do セルフモニタリングダイアリー or Simple Mood Log have ads?

Simple Mood Log shows ads; セルフモニタリングダイアリー does not.

### Which is updated more often, セルフモニタリングダイアリー or Simple Mood Log?

セルフモニタリングダイアリー ships an update every 13 months, and Simple Mood Log every 3 days. Most recently, セルフモニタリングダイアリー was updated on October 26, 2026 and Simple Mood Log on November 3, 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.*