# 321 ToDo vs Kigen ~ penguin task tracker

The clearest difference is in-app purchases: 321 ToDo at none against Kigen ~ penguin task tracker's 3. 321 ToDo also leads on update cadence (every 3 days vs every 9 days) and iOS requirement (9.0 vs 16.6). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Kigen ~ penguin task tracker sells 3 one-off in-app purchases. 321 ToDo asks for nothing beyond the download.

321 ToDo ships an update every 3 days, Kigen ~ penguin task tracker every 9 days. The most recent releases landed on June 11, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 321 ToDo | Kigen ~ penguin task tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/321-todo-countdown-todo/id1542891687/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 64 MB | 20 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shibapp LLC](https://appshunter.io/developer/852300851) | [Taito Iikura](https://appshunter.io/developer/1506013840) |

## What reviewers say

### 321 ToDo

[App page](https://appshunter.io/ios/app/321-todo-countdown-todo/id1542891687)

Organize your tasks with a countdown to their due dates. This app helps you manage your to-do list with real-time grace period displays and customizable reminders. Features include swipe-to-delete, sorting options, and repeat task settings.

**Highlights:** Countdown to due dates, Swipe to delete tasks, Manual and automatic sorting, Customizable reminders, Repeat task function, Theme color customization, Badge display for incomplete tasks

**Features:** macOS Compatibility

**In-app purchases:** none


### Kigen ~ penguin task tracker

[App page](https://appshunter.io/ios/app/kigen-penguin-task-tracker/id6477283404)

This app helps you manage tasks and meet deadlines with a simple interface. It uses color-coded indicators for due dates and a punctuality level system to motivate users. Receive timely notifications to stay on track.

**Highlights:** Task title, note, due date, and importance entry, Color-coded due date status indicators, Punctuality level system for motivation, Customizable deadline notifications, Simple task completion marking

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Kigen App | $1.99 | one-time |
| Support Kigen App | $4.99 | one-time |
| Ads Free Plan | $14.99 | one-time |


## Frequently asked questions

### Is 321 ToDo free?

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

### Is Kigen ~ penguin task tracker free?

Kigen ~ penguin task tracker is free to download, with in-app purchases available.

### Do 321 ToDo or Kigen ~ penguin task tracker have ads?

Both 321 ToDo and Kigen ~ penguin task tracker show ads.

### Which is updated more often, 321 ToDo or Kigen ~ penguin task tracker?

321 ToDo ships an update every 3 days, and Kigen ~ penguin task tracker every 9 days. Most recently, 321 ToDo was updated on June 11, 2026 and Kigen ~ penguin task tracker on September 18, 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.*