# O'Dive vs Tech Dive

The clearest difference is in-app purchases: O'Dive at none against Tech Dive's 2. O'Dive also leads on iOS requirement (13.0 vs 17.0). 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. O'Dive asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for O'Dive against 5.0 for Tech Dive. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

O'Dive ships an update monthly, Tech Dive every 4 weeks. The most recent releases landed on June 4, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | O'Dive | Tech Dive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/odive/id1534593720/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/tech-dive/id6483004689/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 25 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AZOTH SYSTEMS](https://appshunter.io/developer/1534593722) | [Skytip LLC](https://appshunter.io/developer/1569880600) |

## What reviewers say

### O'Dive

[App page](https://appshunter.io/ios/app/odive/id1534593720)

This app uses patented acoustic sensor technology to analyze gas microbubbles detected after a dive. It helps divers assess their decompression procedures and improve their safety and practice based on personalized acoustic measurements.

**Highlights:** Acoustic sensor technology, Gas microbubble detection, Personalized decompression analysis, Diving practice improvement, Diving safety enhancement, Sensor control interface

**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 O'Dive free?

O'Dive 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, O'Dive or Tech Dive?

O'Dive and Tech Dive are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do O'Dive or Tech Dive have ads?

Neither O'Dive nor Tech Dive shows ads.

### Which is updated more often, O'Dive or Tech Dive?

O'Dive ships an update monthly, and Tech Dive every 4 weeks. Most recently, O'Dive was updated on June 4, 2026 and Tech Dive on September 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.*