# Buoyancy Calc vs Kraken NextGen

The clearest difference is rating: Buoyancy Calc at 3.1 against Kraken NextGen's 2.5. Buoyancy Calc also leads on in-app purchases (none vs 4) and ratings volume (25 vs 6). Kraken NextGen's advantage is review sentiment (67% vs 40%). On price, update cadence and ads there is nothing between them.

Both are free to download. Kraken NextGen sells 4 in-app purchases, starting at $4.99 per 7 days. Buoyancy Calc asks for nothing beyond the download.

Buoyancy Calc holds the better App Store score, 3.1 against 2.5. Both are backed by a comparable volume of ratings — 25 and 6 respectively. Written reviews complicate that: 40% of Buoyancy Calc's written reviews are positive against 67% of Kraken NextGen's, so the app with the better star average is not the one people write more warmly about.

Buoyancy Calc ships an update every 3 months, Kraken NextGen every 2 months. Both last shipped on October 22, 2026.

## The numbers

| Metric | Buoyancy Calc | Kraken NextGen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (25 ratings)](https://appshunter.io/ios/app/buoyancy-calc/id1482332472/reviews)** | [2.5 (6 ratings)](https://appshunter.io/ios/app/kraken-nextgen/id6478402046/reviews) |
| Number of ratings | **25** | 6 |
| Positive reviews | 40.0% of reviews | **66.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 322 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Eric Hamiter](https://appshunter.io/developer/1482332471) | [DATS Sports](https://appshunter.io/developer/1556559865) |

## What reviewers say

### Buoyancy Calc

[App page](https://appshunter.io/ios/app/buoyancy-calc/id1482332472)

Calculate the optimal weight for scuba diving based on environmental factors. Input your weight, water type, tank, and exposure suit to get a suggested weight for neutral buoyancy.

**Highlights:** Calculate suggested diving weight, Adjust for water type, Adjust for tank type, Adjust for exposure suit, Supports pounds and kilograms

**Features:** macOS Compatibility

**In-app purchases:** none


### Kraken NextGen

[App page](https://appshunter.io/ios/app/kraken-nextgen/id6478402046)

Enhance your underwater photography and track dives with AI-powered image improvements and detailed dive logging. This app works with smart housings to provide real-time data and safety timers for a superior diving experience.

**Highlights:** AI Image Enhancement, AI Color Correction, AI Image Denoise, Comprehensive Dive Logs, Real-Time Dive Tracking, Cool-Down Timers, Decompression Calculations

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kraken Pro Weekly | $4.99 | per 7 days |
| Kraken Pro Monthly | $9.99 | per month |
| Kraken Pro Half-Yearly | $49.99 | per 6 months |
| Kraken Pro Yearly | $79.99 | per year |


## Frequently asked questions

### Is Buoyancy Calc free?

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

### Is Kraken NextGen free?

Kraken NextGen is free to download, with in-app purchases available.

### Which has better reviews, Buoyancy Calc or Kraken NextGen?

Buoyancy Calc is rated higher. Buoyancy Calc averages 3.1 out of 5 from 25 ratings, while Kraken NextGen averages 2.5 from 6 ratings.

### Do Buoyancy Calc or Kraken NextGen have ads?

Neither Buoyancy Calc nor Kraken NextGen shows ads.

### Which is updated more often, Buoyancy Calc or Kraken NextGen?

Buoyancy Calc ships an update every 3 months, and Kraken NextGen every 2 months. Most recently, Buoyancy Calc was updated on October 22, 2026 and Kraken NextGen on October 22, 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.*