# Math Alarm Clock by Mathy vs Calex PyroNFC

The clearest difference is review sentiment: Math Alarm Clock by Mathy at 74% against Calex PyroNFC's 0%. Math Alarm Clock by Mathy also leads on rating (4.4 vs 1.0) and ratings volume (111 vs 1). Calex PyroNFC's advantage is in-app purchases (none vs 12) and iOS requirement (8.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Math Alarm Clock by Mathy sells 12 in-app purchases, starting at $0.99 per month. Calex PyroNFC asks for nothing beyond the download.

Math Alarm Clock by Mathy holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Math Alarm Clock by Mathy has 111 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 74% of Math Alarm Clock by Mathy's written reviews are positive against 0% of Calex PyroNFC's.

Math Alarm Clock by Mathy ships an update every 8 days, Calex PyroNFC every 3 weeks. The most recent releases landed on October 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Math Alarm Clock by Mathy | Calex PyroNFC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (111 ratings)](https://appshunter.io/ios/app/math-alarm-clock-by-mathy/id1419685308/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/calex-pyronfc/id1544238822/reviews) |
| Number of ratings | **111** | 1 |
| Positive reviews | **73.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 67 MB | 32 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Infinite Wave Media, LLC](https://appshunter.io/developer/495187294) | [Calex Electronics Limited](https://appshunter.io/developer/1544238824) |

## What reviewers say

### Math Alarm Clock by Mathy

[App page](https://appshunter.io/ios/app/math-alarm-clock-by-mathy/id1419685308)

This app requires users to solve math problems to turn off their alarms, ensuring a more effective wake-up experience. It offers customizable alarm settings, including difficulty levels, music choices, and snooze intervals. The app also features a nightstand clock display and adjustable screen brightness.

**Highlights:** Solve math problems to stop alarms, Adjustable math difficulty levels, Customizable alarm sounds and music, Repeating alarm options, Nightstand clock display, Customizable snooze intervals

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Alarm Clock Pro by Mathy | $0.99 | per month |
| Mathy Pro Annual | $9.99 | per year |
| Car Alarm Xtrm | $0.99 | one-time |
| Progressive | $0.99 | one-time |
| Rain On Metal | $0.99 | one-time |
| Retro | $0.99 | one-time |
| Rooster Call | $0.99 | one-time |
| Scream | $0.99 | one-time |
| Sound Grenade | $0.99 | one-time |
| White Noise | $0.99 | one-time |
| All Sounds | $3.99 | one-time |
| Lifetime | $29.99 | one-time |

**What reviewers like**

- 👍 Effective at waking users up
- 💡 Math problems to disable alarm
- 👍 Simple and easy to use
- 👍 Helpful for getting ready
- 👍 Reliable for not being late

**What reviewers complain about**

- 🐛 Alarms turn themselves off
- 🔒 Features locked behind subscription
- 🐛 Does not work in Do Not Disturb mode
- 🔋 Requires phone to be on all night
- 🔊 Alarm sound is too loud

**Reported bugs**

- Alarms turn themselves off
- Alarms do not stay on
- Alarms do not go off
- App doesn't load
- Math difficulty setting is ignored

**Requested features**

- More variety in math equations
- Allow alarms to work in Do Not Disturb mode
- Allow alarms to work without the app being constantly on
- Adjust alarm volume


### Calex PyroNFC

[App page](https://appshunter.io/ios/app/calex-pyronfc/id1544238822)

Configure infrared temperature sensors and read their current temperature using your device. Save settings to your phone and transfer them wirelessly to the sensor via NFC. You can also use NFC to capture temperature readings directly from the sensor.

**Highlights:** Configure PyroNFC sensor settings, Save settings to iOS device, Transmit settings via NFC, Read temperature via NFC, Select temperature units (°C/°F), Set linear voltage output range, Configure alarm thresholds

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Math Alarm Clock by Mathy free?

Math Alarm Clock by Mathy is free to download, with in-app purchases available.

### Is Calex PyroNFC free?

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

### Which has better reviews, Math Alarm Clock by Mathy or Calex PyroNFC?

Math Alarm Clock by Mathy is rated higher. Math Alarm Clock by Mathy averages 4.4 out of 5 from 111 ratings, while Calex PyroNFC averages 1.0 from 1 ratings.

### Do Math Alarm Clock by Mathy or Calex PyroNFC have ads?

Neither Math Alarm Clock by Mathy nor Calex PyroNFC shows ads.

### Which is updated more often, Math Alarm Clock by Mathy or Calex PyroNFC?

Math Alarm Clock by Mathy ships an update every 8 days, and Calex PyroNFC every 3 weeks. Most recently, Math Alarm Clock by Mathy was updated on October 22, 2026 and Calex PyroNFC on October 29, 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.*