# Qubit vs Fusen

The clearest difference is in-app purchases: Qubit at none against Fusen's 1. Qubit also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). Fusen's advantage is update cadence (every 6 days vs every 3 weeks). On price and ads there is nothing between them.

Both are free to download. Fusen sells 1 one-off in-app purchase. Qubit asks for nothing beyond the download.

Qubit ships an update every 3 weeks, Fusen every 6 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Qubit | Fusen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/qubit-habit-tracker/id6760244309/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 46 MB | 7 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jin Park](https://appshunter.io/developer/1677219089) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### Qubit

[App page](https://appshunter.io/ios/app/qubit-habit-tracker/id6760244309)

This app offers a straightforward approach to habit tracking, allowing users to simply create habits and mark them as complete. It focuses on visual progress and motivation through a minimalist interface, avoiding complex features and data overload.

**Highlights:** Simple habit creation, Tap to check completion, Visual consistency tracking, Minimalist interface, Motivation through progress visualization

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

**In-app purchases:** none


### Fusen

[App page](https://appshunter.io/ios/app/fusen-sticky-note-widgets/id6791538493)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Qubit free?

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

### Is Fusen free?

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

### Do Qubit or Fusen have ads?

Both Qubit and Fusen show ads.

### Which is updated more often, Qubit or Fusen?

Qubit ships an update every 3 weeks, and Fusen every 6 days. Most recently, Qubit was updated on October 31, 2026 and Fusen on November 5, 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.*