# HeartMath vs 45 Day Challenge

The clearest difference is in-app purchases: 45 Day Challenge at none against HeartMath's 5. 45 Day Challenge also leads on iOS requirement (16.6 vs 26.0). HeartMath's advantage is ratings volume (4.6K vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. HeartMath sells 4 in-app purchases, starting at $39.00 per year. 45 Day Challenge asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for HeartMath against 5.0 for 45 Day Challenge. That said, the two scores are not equally well evidenced: HeartMath has 4.6K ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | HeartMath | 45 Day Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (4.6K ratings)](https://appshunter.io/ios/app/heartmath/id6446414998/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/45-day-challenge/id6502245079/reviews)** |
| Number of ratings | **4.6K** | 1 |
| Positive reviews | 73.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Freemium | **Free** |
| Size | 185 MB | 49 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [HeartMath Inc.](https://appshunter.io/developer/482739914) | [Emily Sudduth](https://appshunter.io/developer/1721274803) |

## What reviewers say

### HeartMath

[App page](https://appshunter.io/ios/app/heartmath/id6446414998)

This app helps you manage stress, improve focus, and achieve optimal performance by aligning your heart, mind, and emotions. It offers guided sessions, immersive journeys, and coherence practices based on over 30 years of research.

**Highlights:** Real-time HRV Coherence Measurement, Coherence Training, Scientifically Validated Techniques, Guided Learning Sessions, Progress Tracking, Heart-Brain Coherence Benefits

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HeartMath Premium | $39.00 | per year |
| HeartMath Premium | $59.00 | per year |
| HeartMath Premium | $79.00 | per year |
| HeartMath Premium | $99.99 | per year |

**What reviewers like**

- 🚀 Huge improvement over previous app
- 👍 Easy to use and highly recommended
- 💡 Loaded with HeartMath techniques and courses
- 👍 Powerful tool for nervous system balance and anxiety reduction
- 👍 Helps achieve a better mental state

**What reviewers complain about**

- 🐛 Connectivity issues with sensor
- 🐛 Sensor not compatible with older devices
- 🐛 App crashes and freezes on newer devices
- 🐛 Inaccurate heart rate and coherence readings
- 🐛 Disruptive screen sleep behavior during sessions

**Reported bugs**

- Sensor connection issues on newer devices
- App crashes and freezes on iPhone 16 Pro
- Inaccurate heart rate and coherence readings
- Screen sleep behavior disrupting sessions

**Requested features**

- Add dark mode option
- Allow playing music/sounds during sessions
- Provide audio feedback on coherence levels
- Add session history customization and details
- Improve sensor compatibility with older devices


### 45 Day Challenge

[App page](https://appshunter.io/ios/app/45-day-challenge/id6502245079)

Access all your workout videos in one convenient app. Receive timely updates and easily save your favorite content. Enjoy a seamless experience without needing to remember passwords.

**Highlights:** Access all videos in one app, Push notifications for updates, Password-free video access, Save favorite posts, Easy-to-use interface

**In-app purchases:** none


## Frequently asked questions

### Is HeartMath free?

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

### Is 45 Day Challenge free?

45 Day Challenge is free to download, with no in-app purchases.

### Which has better reviews, HeartMath or 45 Day Challenge?

45 Day Challenge is rated higher. HeartMath averages 4.9 out of 5 from 4.6K ratings, while 45 Day Challenge averages 5.0 from 1 ratings.

### Do HeartMath or 45 Day Challenge have ads?

Neither HeartMath nor 45 Day Challenge shows ads.

### Which is updated more often, HeartMath or 45 Day Challenge?

HeartMath ships an update every 3 weeks, and 45 Day Challenge every 3 weeks. Most recently, HeartMath was updated on October 19, 2026 and 45 Day Challenge on October 8, 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.*