# UDWriter vs 3sec Diary

The clearest difference is ads: UDWriter at none against 3sec Diary's shown. UDWriter also leads on update cadence (every 2 months vs every 26 months). 3sec Diary's advantage is review sentiment (60% vs 38%). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. UDWriter sells 2 one-off in-app purchases and 3sec Diary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UDWriter ships an update every 2 months, 3sec Diary every 26 months. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | UDWriter | 3sec Diary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | **60.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 26 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 12 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shamrock Records, Inc.](https://appshunter.io/developer/443431466) | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) |

## What reviewers say

### UDWriter

[App page](https://appshunter.io/ios/app/udwriter/id632058683)

A handwriting memo app designed with Universal Design principles for intuitive use. Offers three color options and a simple swipe gesture to clear the screen. Accessible for all users from the first use.

**Highlights:** Universal Design principles, Handwriting memo functionality, Select 3 colors, Swipe to clear all, Intuitive for all users

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Development Support + Logo on/off option | $2.99 | one-time |
| Input Text by Using Speech Recognition | $4.99 | one-time |


### 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 |


## Frequently asked questions

### Is UDWriter free?

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

### Is 3sec Diary free?

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

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

3sec Diary shows ads; UDWriter does not.

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

UDWriter ships an update every 2 months, and 3sec Diary every 26 months. Most recently, UDWriter was updated on October 29, 2026 and 3sec Diary on October 21, 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.*