Qubit vs Fusen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Qubit
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.
- Simple habit creation
- Tap to check completion
- Visual consistency tracking
- Minimalist interface
- Motivation through progress visualization
Read full descriptionHide full description
Did you do it today? Most habit trackers are complicated. Too many charts, too many settings, too much friction. Qubit keeps it simple. Just create your habits and check them when you complete them. That's it. No clutter. No complicated tracking. Just a simple way to see your consistency. Perfect for tracking habits like: • Exercise • Reading • Drinking water • Studying • Taking vitamins • Meditation • Daily routines Why CheckSquare? Simple Habit Tracking Just tap to check when you complete a habit. See Your Consistency Visual squares help you see your progress at a glance. Stay Motivated Watching your squares fill up makes it easier to stay consistent. Minimal & Focused No complicated dashboards or overwhelming data. Build better habits. One square at a time. Download Qubit and start checking today.
Fusen
Read full descriptionHide full description
A note only helps if you actually see it. Fusen lets you stick notes right onto your iPhone's Home Screen, Lock Screen, and StandBy. Write a note in the app, pick a skin, and the next time you pick up your phone, the thing that matters is right there. Little stationery: washi paper and masking tape ・Each note is drawn with soft gradients and paper-fiber texture ・Every skin is free — the classic yellow, sakura, fresh green, sky, wisteria, tangerine, natural, and sumi, plus the retro cafe set: coffee, matcha cream, custard, and cream soda The widget is the whole point ・Home Screen: small, medium, and large sizes ・Lock Screen: keep a note under the clock ・StandBy: for the bedside landscape display too ・Two display modes: pinned-first, or rotation ・Pick exactly which notes each widget shows Just write ・Open the app and write. Your widgets update the moment you save ・Pin the note that matters most so it always shows first ・Text size adjusts to fit Pricing ・Every feature is free (unlimited notes, all skins) ・A banner ad is shown at the bottom of the screen ・If you prefer a cleaner view, an optional one-time "Remove Ads" purchase is available. There is no subscription Privacy All notes are stored only on your device. No account is required, and there is no upload or tracking.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Qubit | Fusen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 46 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Jin Park | 丽佳 施 |
In-app purchases
Qubit
No in-app purchases
Fusen
- Remove Ads$0.99








