# myArmsCache vs Buoyancy Calc

The clearest difference is rating: myArmsCache at 4.7 against Buoyancy Calc's 3.1. myArmsCache also leads on review sentiment (81% vs 40%) and ratings volume (2.2K vs 25). Buoyancy Calc's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. myArmsCache sells 3 in-app purchases, starting at $3.99 per month. Buoyancy Calc asks for nothing beyond the download.

myArmsCache holds the better App Store score, 4.7 against 3.1. That said, the two scores are not equally well evidenced: myArmsCache has 2.2K ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 81% of myArmsCache's written reviews are positive against 40% of Buoyancy Calc's.

myArmsCache ships an update every 3 weeks, Buoyancy Calc every 3 months. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | myArmsCache | Buoyancy Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.2K ratings)](https://appshunter.io/ios/app/myarmscache/id1144651239/reviews)** | [3.1 (25 ratings)](https://appshunter.io/ios/app/buoyancy-calc/id1482332472/reviews) |
| Number of ratings | **2.2K** | 25 |
| Positive reviews | **80.6% of reviews** | 40.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 34 MB | 1 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Drea Creative, LLC](https://appshunter.io/developer/596509575) | [Eric Hamiter](https://appshunter.io/developer/1482332471) |

## What reviewers say

### myArmsCache

[App page](https://appshunter.io/ios/app/myarmscache/id1144651239)

Easily track your firearms, ammunition, magazines, and accessories. Record range visits, monitor spending, and manage maintenance. All your data is stored locally for privacy.

**Highlights:** Detailed firearm and accessory inventory, Ammo usage and purchase tracking, Magazine management and reliability ratings, Maintenance and repair logs, Range visit records with target photos, Shopping and wish lists, Customizable organization with tags

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Membership | $3.99 | per month |
| 6-Month Premium Membership | $14.99 | per 6 months |
| Yearly Premium Membership | $19.99 | per year |

**What reviewers like**

- 🚀 Great app for all firearms needs
- 👍 Easy to use and user-friendly
- 💡 Excellent for inventory and organization
- 🔒 Secure way to store firearm information
- 👍 Comprehensive features for tracking guns, accessories, ammo, and more

**What reviewers complain about**

- 🐛 Issues with data loss and syncing across devices
- 💰 Subscription model is frustrating for previous paid users
- 🔒 Concerns about data privacy and storage
- 👎 Limited free version with restricted functionality

**Reported bugs**

- App crashes or becomes unresponsive
- Issues with restoring purchases and accessing full app functionality

**Requested features**

- Ability to upload documents and PDFs
- More flexible photo management (e.g., multiple photos per item, zoom/crop)
- Improved ammo tracking and reporting
- Sync data across multiple devices
- Customizable views and reports


### 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


## Frequently asked questions

### Is myArmsCache free?

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

### Is Buoyancy Calc free?

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

### Which has better reviews, myArmsCache or Buoyancy Calc?

myArmsCache is rated higher. myArmsCache averages 4.7 out of 5 from 2.2K ratings, while Buoyancy Calc averages 3.1 from 25 ratings.

### Do myArmsCache or Buoyancy Calc have ads?

Neither myArmsCache nor Buoyancy Calc shows ads.

### Which is updated more often, myArmsCache or Buoyancy Calc?

myArmsCache ships an update every 3 weeks, and Buoyancy Calc every 3 months. Most recently, myArmsCache was updated on October 19, 2026 and Buoyancy Calc on October 14, 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.*