# Scuba Dive Signals vs Tech Dive

The clearest difference is in-app purchases: Scuba Dive Signals at none against Tech Dive's 2. Scuba Dive Signals also leads on iOS requirement (15.0 vs 17.0). Tech Dive's advantage is update cadence (every 4 weeks vs every 42 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Tech Dive sells 2 in-app purchases, starting at $0.99 per month. Scuba Dive Signals asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Scuba Dive Signals against 5.0 for Tech Dive. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Scuba Dive Signals ships an update every 42 months, Tech Dive every 4 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Scuba Dive Signals | Tech Dive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/scuba-dive-signals/id1483856571/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/tech-dive/id6483004689/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 16 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eric Hamiter](https://appshunter.io/developer/1482332471) | [Skytip LLC](https://appshunter.io/developer/1569880600) |

## What reviewers say

### Scuba Dive Signals

[App page](https://appshunter.io/ios/app/scuba-dive-signals/id1483856571)

Access a comprehensive list of underwater hand signals for safe scuba diving communication. Includes a quiz feature to test your knowledge of signals recognized by major training agencies.

**Highlights:** List of recognized dive hand signals, Signals from PADI, NAUI, SSI, Quiz feature to test knowledge, Safety communication focus, Creative Commons licensed images

**Features:** macOS Compatibility

**In-app purchases:** none


### Tech Dive

[App page](https://appshunter.io/ios/app/tech-dive/id6483004689)

This app helps plan scuba dives with various calculators for gas, depth, and air consumption. It supports metric and imperial units and offers advanced features through an in-app purchase.

**Highlights:** Dive planning calculators, Gas and air consumption calculations, Metric and imperial unit support, Depth and EAD calculations, Enriched Air-Nitrox mix calculation, Unit conversion tools

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $0.99 | per month |
| Plus Annual | $7.99 | per year |


## Frequently asked questions

### Is Scuba Dive Signals free?

Scuba Dive Signals is free to download, with no in-app purchases.

### Is Tech Dive free?

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

### Which has better reviews, Scuba Dive Signals or Tech Dive?

Scuba Dive Signals and Tech Dive are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do Scuba Dive Signals or Tech Dive have ads?

Neither Scuba Dive Signals nor Tech Dive shows ads.

### Which is updated more often, Scuba Dive Signals or Tech Dive?

Scuba Dive Signals ships an update every 42 months, and Tech Dive every 4 weeks. Most recently, Scuba Dive Signals was updated on October 8, 2026 and Tech Dive on October 11, 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.*