# 3sec Diary vs LEAF MEMO

The clearest difference is in-app purchases: LEAF MEMO at none against 3sec Diary's 1. LEAF MEMO also leads on update cadence (every 2 weeks vs every 26 months). 3sec Diary's advantage is iOS requirement (12.0 vs 15.5). 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. LEAF MEMO asks for nothing beyond the download.

3sec Diary ships an update every 26 months, LEAF MEMO every 2 weeks. The most recent releases landed on July 4, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | 3sec Diary | LEAF MEMO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 38 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) | [NAOKI TAKESHITA](https://appshunter.io/developer/511004463) |

## 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 |


### LEAF MEMO

[App page](https://appshunter.io/ios/app/leaf-memo/id6746084097)

**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 LEAF MEMO free?

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

### Do 3sec Diary or LEAF MEMO have ads?

Both 3sec Diary and LEAF MEMO show ads.

### Which is updated more often, 3sec Diary or LEAF MEMO?

3sec Diary ships an update every 26 months, and LEAF MEMO every 2 weeks. Most recently, 3sec Diary was updated on July 4, 2026 and LEAF MEMO on August 14, 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.*