# 3sec Diary vs AI Note before forgetting

The clearest difference is in-app purchases: AI Note before forgetting at none against 3sec Diary's 1. AI Note before forgetting also leads on update cadence (every 2 months vs every 26 months). 3sec Diary's advantage is iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. 3sec Diary sells 1 one-off in-app purchase. AI Note before forgetting asks for nothing beyond the download.

3sec Diary ships an update every 26 months, AI Note before forgetting every 2 months. The most recent releases landed on July 4, 2026 and June 22, 2026 respectively.

## The numbers

| Metric | 3sec Diary | AI Note before forgetting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (10 ratings)](https://appshunter.io/ios/app/ai-note-before-forgetting/id1541774073/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 12 MB | 7 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) | [Hideshi Otsuru](https://appshunter.io/developer/446092368) |

## What reviewers say

### 3sec Diary

[App page](https://appshunter.io/ios/app/3sec-diary/id985967203)

Quickly log daily activities and feelings in just three seconds. Your entries are securely stored in your iPhone Calendar, ensuring data safety and easy access. This tool helps you preserve memories and makes research and sharing effortless.

**Highlights:** 3-second daily logging, Calendar integration, Secure data storage, Easy research and sharing, Memory preservation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eliminate Ads | $0.99 | one-time |


### AI Note before forgetting

[App page](https://appshunter.io/ios/app/ai-note-before-forgetting/id1541774073)

Capture your thoughts and ideas with this app. It allows you to save notes, add location details like address and weather, and even attach photos and videos. AI features can help generate ideas, summarize, and proofread your entries.

**Highlights:** AI-powered idea generation, Note summarization and proofreading, Automatic location data (date, time, address, weather), Add photos and videos to notes, Folder organization, Search functionality, Note sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3sec Diary free?

3sec Diary is free to download, with in-app purchases available.

### Is AI Note before forgetting free?

AI Note before forgetting is free to download, with no in-app purchases.

### Do 3sec Diary or AI Note before forgetting have ads?

Both 3sec Diary and AI Note before forgetting show ads.

### Which is updated more often, 3sec Diary or AI Note before forgetting?

3sec Diary ships an update every 26 months, and AI Note before forgetting every 2 months. Most recently, 3sec Diary was updated on July 4, 2026 and AI Note before forgetting on June 22, 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.*