# AHA Knowledge Booster vs Relay Response CPR Training

The clearest difference is update cadence: Relay Response CPR Training at weekly against AHA Knowledge Booster's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AHA Knowledge Booster sells 4 in-app purchases, starting at $1.99 per year and Relay Response CPR Training sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

AHA Knowledge Booster ships an update every 5 weeks, Relay Response CPR Training weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | AHA Knowledge Booster | Relay Response CPR Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (569 ratings)](https://appshunter.io/ios/app/aha-knowledge-booster/id1586998263/reviews)** | — |
| Number of ratings | **569** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 204 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 17+ |
| Developer | [Trivie, Inc](https://appshunter.io/developer/510337124) | [Ximio Health Inc](https://appshunter.io/developer/1296441024) |

## What reviewers say

### AHA Knowledge Booster

[App page](https://appshunter.io/ios/app/aha-knowledge-booster/id1586998263)

Reinforce critical CPR and emergency care knowledge with personalized quizzes. Choose topics like BLS, ACLS, and PALS to build mastery and improve long-term retention of lifesaving information.

**Highlights:** Personalized quizzes, Adaptive learning algorithm, Proficiency mapping, Multiple topic choices (BLS, ACLS, PALS, First Aid, CPR), Neuroscience-based retrieval practice, Long-term knowledge retention

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PALS | $1.99 | per year |
| BLS | $1.99 | per year |
| ACLS | $2.99 | per year |
| All-Access Bundle | $3.99 | per year |

**What reviewers like**

- 👍 Great refresher app
- 👍 Simple and functional
- 👍 Helpful for learning
- 👍 Enjoyable quizzes
- 👍 Concise information files

**What reviewers complain about**

- 🐛 App doesn't work
- 🐛 App is empty
- 🐛 Never sends link
- 🐛 Requires login
- 🐛 Paid app requires login

**Reported bugs**

- Literally doesn't work
- App opens but is completely empty
- Asks for email, never sends link
- Requires a login when already paid
- Can't sign on

**Requested features**

- Explanations for incorrect answers
- New update


### Relay Response CPR Training

[App page](https://appshunter.io/ios/app/relay-response-cpr-training/id1633062947)

**Features:** Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hands Only CPR Training | $7.99 | per month |
| Hands Only CPR Training | $29.99 | per year |
| Hands Only CPR Training | $79.99 | per year |


## Frequently asked questions

### Is AHA Knowledge Booster free?

AHA Knowledge Booster is free to download, with in-app purchases available.

### Is Relay Response CPR Training free?

Relay Response CPR Training is free to download, with in-app purchases available.

### Do AHA Knowledge Booster or Relay Response CPR Training have ads?

Neither AHA Knowledge Booster nor Relay Response CPR Training shows ads.

### Which is updated more often, AHA Knowledge Booster or Relay Response CPR Training?

AHA Knowledge Booster ships an update every 5 weeks, and Relay Response CPR Training weekly. Most recently, AHA Knowledge Booster was updated on October 25, 2026 and Relay Response CPR Training on October 24, 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.*