# 90daysChallenge vs Jo一個T9

The clearest difference is update cadence: Jo一個T9 at weekly against 90daysChallenge's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

90daysChallenge ships an update every 3 weeks, Jo一個T9 weekly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 90daysChallenge | Jo一個T9 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/90dayschallenge/id6757923468/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 10 MB | 17 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HSIN JUI YU](https://appshunter.io/developer/1869655062) | [YEN YU LIN](https://appshunter.io/developer/6807881962) |

## What reviewers say

### 90daysChallenge

[App page](https://appshunter.io/ios/app/90dayschallenge/id6757923468)

This app helps you build lasting habits and improve focus through a structured 90-day challenge. It offers dedicated focus modes for deep work and quick sprints, along with daily reminders and motivational quotes to keep you on track.

**Highlights:** 90-Day Challenge Tracker, Deep Focus Mode, Sprint Mode, Daily Reminders, Daily Motivation Quotes

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

**In-app purchases:** none


### Jo一個T9

[App page](https://appshunter.io/ios/app/jot9/id6809322077)

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

**In-app purchases:** none


## Frequently asked questions

### Is 90daysChallenge free?

90daysChallenge is free to download, with no in-app purchases.

### Is Jo一個T9 free?

Jo一個T9 is free to download, with no in-app purchases.

### Do 90daysChallenge or Jo一個T9 have ads?

Neither 90daysChallenge nor Jo一個T9 shows ads.

### Which is updated more often, 90daysChallenge or Jo一個T9?

90daysChallenge ships an update every 3 weeks, and Jo一個T9 weekly. Most recently, 90daysChallenge was updated on October 21, 2026 and Jo一個T9 on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*