# nitroxCalc vs Diveplanner Tec & Rec

The clearest difference is in-app purchases: nitroxCalc at none against Diveplanner Tec & Rec's 3. nitroxCalc also leads on iOS requirement (9.0 vs 13.0). Diveplanner Tec & Rec's advantage is update cadence (every 3 months vs every 18 months) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Diveplanner Tec & Rec sells 3 one-off in-app purchases. nitroxCalc asks for nothing beyond the download.

nitroxCalc ships an update every 18 months, Diveplanner Tec & Rec every 3 months. The most recent releases landed on September 8, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | nitroxCalc | Diveplanner Tec & Rec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.1 (7 ratings)](https://appshunter.io/ios/app/diveplanner-tec-and-rec/id1506985833/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 5 MB | 37 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [CAP-REL](https://appshunter.io/developer/1405536766) | [Sensetrails LLC](https://appshunter.io/developer/806088250) |

## What reviewers say

### nitroxCalc

[App page](https://appshunter.io/ios/app/nitroxcalc/id1408060704)

**Features:** macOS Compatibility

**In-app purchases:** none


### Diveplanner Tec & Rec

[App page](https://appshunter.io/ios/app/diveplanner-tec-and-rec/id1506985833)

Plan technical and recreational scuba dives with detailed gas management, decompression schedules, and contingency planning. This tool helps divers quickly create and share dive plans for various depths and conditions.

**Highlights:** Technical and recreational dive planning, Multi-gas and CCR dive schedules, Bühlmann decompression model (ZH16L-C), Automatic contingency plans, Gas requirement and weight calculation, Dive table generation, Metric and Imperial units

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Two weeks free trial | Free | one-time |
| Tec Basic | $7.99 | one-time |
| Tec Advanced | $19.99 | one-time |


## Frequently asked questions

### Is nitroxCalc free?

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

### Is Diveplanner Tec & Rec free?

Diveplanner Tec & Rec is free to download, with in-app purchases available.

### Do nitroxCalc or Diveplanner Tec & Rec have ads?

Neither nitroxCalc nor Diveplanner Tec & Rec shows ads.

### Which is updated more often, nitroxCalc or Diveplanner Tec & Rec?

nitroxCalc ships an update every 18 months, and Diveplanner Tec & Rec every 3 months. Most recently, nitroxCalc was updated on September 8, 2026 and Diveplanner Tec & Rec on August 19, 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.*