# Duux vs MathBell

The clearest difference is rating: Duux at 4.8 against MathBell's 3.0. Duux also leads on in-app purchases (none vs 3) and ratings volume (24 vs 1). MathBell's advantage is update cadence (every 4 days vs monthly). On price and ads there is nothing between them.

Both are free to download. MathBell sells 3 in-app purchases, starting at $1.99 per month. Duux asks for nothing beyond the download.

Duux holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Duux has 24 ratings behind it against 1, so its average is the more settled of the two.

Duux ships an update monthly, MathBell every 4 days. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Duux | MathBell |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (24 ratings)](https://appshunter.io/ios/app/duux/id1627712939/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/mathbell-math-alarm-clock/id6818749420/reviews) |
| Number of ratings | **24** | 1 |
| Positive reviews | 30.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | **Free** | Freemium |
| Size | 122 MB | 18 MB |
| Requires iOS | **15.1** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Duux B.V.](https://appshunter.io/developer/1474620118) | [Tien Dat Nguyen](https://appshunter.io/developer/1896097777) |

## What reviewers say

### Duux

[App page](https://appshunter.io/ios/app/duux/id1627712939)

Manage your Duux air treatment devices remotely for a healthier living environment. Monitor air quality, schedule operations, and adjust settings from anywhere with an intuitive interface.

**Highlights:** Real-time device monitoring, Easy scheduling of operations, Remote control capabilities, Intuitive user interface, Manage air quality, Enhance living space

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Heater works well and warms room quickly
- 👍 Slick design and intuitive app
- 👍 Excellent user experience
- 🚀 Powerful and effective
- 👍 Recommended product

**What reviewers complain about**

- 🐛 App is buggy and unreliable
- 🐛 Frequent disconnections and connection issues
- 🐛 App is useless, doesn't work as advertised
- 🐛 App is outdated and lacks functionality
- 🐛 App is terrible, freezes device

**Reported bugs**

- App frequently loses connection with device
- App unable to find or add device
- App UI and functionality regressed with updates
- Devices randomly disconnecting from WiFi
- App login/registration issues

**Requested features**

- Add ability to edit schedules
- Implement away mode or low temperature setting
- Allow rearranging of rooms in app
- Add more scheduling options and flexibility
- Improve Alexa/Google Home integration


### MathBell

[App page](https://appshunter.io/ios/app/mathbell-math-alarm-clock/id6818749420)

This app uses math puzzles to ensure you wake up. Solve arithmetic, missing numbers, or running totals to silence your alarm. It offers follow-up alerts and a wake-up check to keep you alert.

**Highlights:** Math puzzles to stop alarms, Multiple puzzle types and difficulties, Follow-up alarms until solved, Limited snooze functionality, Customizable alarm repeats, Home and Lock Screen widgets

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathBell Pro Monthly | $1.99 | per month |
| MathBell Pro Yearly | $4.99 | per year |
| MathBell Pro | $14.99 | one-time |


## Frequently asked questions

### Is Duux free?

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

### Is MathBell free?

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

### Which has better reviews, Duux or MathBell?

Duux is rated higher. Duux averages 4.8 out of 5 from 24 ratings, while MathBell averages 3.0 from 1 ratings.

### Do Duux or MathBell have ads?

Neither Duux nor MathBell shows ads.

### Which is updated more often, Duux or MathBell?

Duux ships an update monthly, and MathBell every 4 days. Most recently, Duux was updated on November 12, 2026 and MathBell on November 9, 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.*