# Rescue Knots vs Airtime BT

The clearest difference is price: Airtime BT at Free against Rescue Knots's $1.99. Airtime BT also leads on in-app purchases (none vs 1) and update cadence (every 3 days vs every 12 months). Rescue Knots's advantage is iOS requirement (9.0 vs 16.6). On ads and device support there is nothing between them.

Airtime BT is free to download; Rescue Knots costs $1.99 up front. Rescue Knots sells 1 one-off in-app purchase. Airtime BT asks for nothing beyond the download.

Rescue Knots ships an update every 12 months, Airtime BT every 3 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rescue Knots | Airtime BT |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/rescue-knots/id484653346/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 17 MB | 3 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fission Media Group Inc.](https://appshunter.io/developer/343056410) | [Guillaume Gerard Frantz Vigneron](https://appshunter.io/developer/1822391314) |

## What reviewers say

### Rescue Knots

[App page](https://appshunter.io/ios/app/rescue-knots/id484653346)

Learn to tie 27 essential search and rescue knots with detailed graphics and step-by-step instructions. This reference app is ideal for professionals in firefighting, police, and military training, providing quick access to critical knot-tying techniques in emergency situations.

**Highlights:** 27 popular search and rescue knots, Detailed graphics emphasizing key steps, Written step-by-step instructions, Zoomed view by rotating phone, Visual glossary of knots, Reference for emergency situations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Rescue Knots to Best Knots | $0.99 | one-time |


### Airtime BT

[App page](https://appshunter.io/ios/app/airtime-bt/id6747722869)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rescue Knots free?

Rescue Knots costs $1.99, and also offers in-app purchases.

### Is Airtime BT free?

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

### Do Rescue Knots or Airtime BT have ads?

Neither Rescue Knots nor Airtime BT shows ads.

### Which is updated more often, Rescue Knots or Airtime BT?

Rescue Knots ships an update every 12 months, and Airtime BT every 3 days. Most recently, Rescue Knots was updated on November 6, 2026 and Airtime BT on October 30, 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.*