# Hundred Day Challenge vs 3DaysDo

The clearest difference is update cadence: 3DaysDo at every 3 weeks against Hundred Day Challenge's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Hundred Day Challenge sells 1 one-off in-app purchase and 3DaysDo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Hundred Day Challenge ships an update every 9 months, 3DaysDo every 3 weeks. The most recent releases landed on November 5, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Hundred Day Challenge | 3DaysDo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/hundred-day-challenge/id6749242232/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 6 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Urs Jaeggi](https://appshunter.io/developer/1709239048) | [洪英 裴](https://appshunter.io/developer/1896144445) |

## What reviewers say

### Hundred Day Challenge

[App page](https://appshunter.io/ios/app/hundred-day-challenge/id6749242232)

This app helps you build lasting habits and achieve goals through consistent, small daily actions over 100 days. Track multiple challenges simultaneously, visualize your progress, and stay motivated with visual cues and milestone rewards.

**Highlights:** Multiple challenges at once, Daily completion tracking, Progress visualization, Motivating main screen, Icon selection per challenge, Progress rewards

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $0.99 | one-time |


### 3DaysDo

[App page](https://appshunter.io/ios/app/3daysdo/id6773829061)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3Days Pro | $0.99 | one-time |


## Frequently asked questions

### Is Hundred Day Challenge free?

Hundred Day Challenge is free to download, with in-app purchases available.

### Is 3DaysDo free?

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

### Do Hundred Day Challenge or 3DaysDo have ads?

Neither Hundred Day Challenge nor 3DaysDo shows ads.

### Which is updated more often, Hundred Day Challenge or 3DaysDo?

Hundred Day Challenge ships an update every 9 months, and 3DaysDo every 3 weeks. Most recently, Hundred Day Challenge was updated on November 5, 2026 and 3DaysDo on November 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.*