# 3sec Diary vs UniSheet

The clearest difference is in-app purchases: UniSheet at none against 3sec Diary's 1. UniSheet also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 26 months). 3sec Diary's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.6). On price there is nothing between them.

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

3sec Diary ships an update every 26 months, UniSheet every 3 weeks. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 3sec Diary | UniSheet |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 26 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 3 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) | [Sho Shimizu](https://appshunter.io/developer/1640208234) |

## 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 |


### UniSheet

[App page](https://appshunter.io/ios/app/unisheet/id6748560683)

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

**In-app purchases:** none


## Frequently asked questions

### Is 3sec Diary free?

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

### Is UniSheet free?

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

### Do 3sec Diary or UniSheet have ads?

3sec Diary shows ads; UniSheet does not.

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

3sec Diary ships an update every 26 months, and UniSheet every 3 weeks. Most recently, 3sec Diary was updated on October 4, 2026 and UniSheet on October 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.*