# NHDOT eFieldBook vs Math Alarm Clock by Mathy

The clearest difference is in-app purchases: NHDOT eFieldBook at none against Math Alarm Clock by Mathy's 12. Math Alarm Clock by Mathy's advantage is update cadence (every 8 days vs every 3 months). On price, ads, device support and iOS requirement 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. NHDOT eFieldBook asks for nothing beyond the download.

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

## The numbers

| Metric | NHDOT eFieldBook | Math Alarm Clock by Mathy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (111 ratings)](https://appshunter.io/ios/app/math-alarm-clock-by-mathy/id1419685308/reviews)** |
| Number of ratings | — | **111** |
| Positive reviews | — | 73.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 67 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExeVision](https://appshunter.io/developer/1406987452) | [Infinite Wave Media, LLC](https://appshunter.io/developer/495187294) |

## What reviewers say

### NHDOT eFieldBook

[App page](https://appshunter.io/ios/app/nhdot-efieldbook/id1406987454)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is NHDOT eFieldBook free?

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

### Is Math Alarm Clock by Mathy free?

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

### Do NHDOT eFieldBook or Math Alarm Clock by Mathy have ads?

Neither NHDOT eFieldBook nor Math Alarm Clock by Mathy shows ads.

### Which is updated more often, NHDOT eFieldBook or Math Alarm Clock by Mathy?

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