# Simple ToDo Diary vs Nudidoo

The clearest difference is in-app purchases: Nudidoo at none against Simple ToDo Diary's 1. Nudidoo also leads on iOS requirement (15.1 vs 18.6). Simple ToDo Diary's advantage is update cadence (daily vs every 4 days). On price, ads and device support there is nothing between them.

Both are free to download. Simple ToDo Diary sells 1 one-off in-app purchase. Nudidoo asks for nothing beyond the download.

Simple ToDo Diary ships an update daily, Nudidoo every 4 days. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Simple ToDo Diary | Nudidoo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 4 days |
| Size | 4 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kazuya Hashimoto](https://appshunter.io/developer/1857972259) | [JEONGWON GO](https://appshunter.io/developer/1896290314) |

## What reviewers say

### Simple ToDo Diary

[App page](https://appshunter.io/ios/app/simple-todo-diary/id6756016949)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を非表示にする | $1.99 | one-time |


### Nudidoo

[App page](https://appshunter.io/ios/app/nudidoo/id6766447781)

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

**In-app purchases:** none


## Frequently asked questions

### Is Simple ToDo Diary free?

Simple ToDo Diary is free to download, with in-app purchases available.

### Is Nudidoo free?

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

### Do Simple ToDo Diary or Nudidoo have ads?

Neither Simple ToDo Diary nor Nudidoo shows ads.

### Which is updated more often, Simple ToDo Diary or Nudidoo?

Simple ToDo Diary ships an update daily, and Nudidoo every 4 days. Most recently, Simple ToDo Diary was updated on October 10, 2026 and Nudidoo on October 7, 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.*