# Buoyancy Calc vs AMT Launch

The clearest difference is update cadence: AMT Launch at every 2 weeks against Buoyancy Calc's every 3 months. AMT Launch also leads on iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Buoyancy Calc ships an update every 3 months, AMT Launch every 2 weeks. The most recent releases landed on June 8, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Buoyancy Calc | AMT Launch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (25 ratings)](https://appshunter.io/ios/app/buoyancy-calc/id1482332472/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 9 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Eric Hamiter](https://appshunter.io/developer/1482332471) | [Air Medical Technologies](https://appshunter.io/developer/1563027396) |

## 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


### AMT Launch

[App page](https://appshunter.io/ios/app/amt-launch/id1611646822)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Buoyancy Calc free?

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

### Is AMT Launch free?

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

### Do Buoyancy Calc or AMT Launch have ads?

Neither Buoyancy Calc nor AMT Launch shows ads.

### Which is updated more often, Buoyancy Calc or AMT Launch?

Buoyancy Calc ships an update every 3 months, and AMT Launch every 2 weeks. Most recently, Buoyancy Calc was updated on June 8, 2026 and AMT Launch on September 7, 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.*