# Sigma Mini vs Coin Tester.

The clearest difference is rating: Sigma Mini at 5.0 against Coin Tester.'s 4.4. Sigma Mini also leads on in-app purchases (none vs 3) and iOS requirement (11.0 vs 14.0). Coin Tester.'s advantage is review sentiment (65% vs 38%) and ratings volume (121 vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Coin Tester. sells 3 in-app purchases, starting at $9.00 per month. Sigma Mini asks for nothing beyond the download.

Sigma Mini holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Coin Tester. has 121 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 38% of Sigma Mini's written reviews are positive against 65% of Coin Tester.'s, so the app with the better star average is not the one people write more warmly about.

Sigma Mini ships an update every 2 months, Coin Tester. monthly. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Sigma Mini | Coin Tester. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sigma-mini/id1548367153/reviews)** | [4.4 (121 ratings)](https://appshunter.io/ios/app/coin-tester/id6448944215/reviews) |
| Number of ratings | 2 | **121** |
| Positive reviews | 37.5% of reviews | **64.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Subscription |
| Size | 6 MB | 95 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Bessette](https://appshunter.io/developer/1548367155) | [Growth & Value](https://appshunter.io/developer/1687037796) |

## What reviewers say

### Sigma Mini

[App page](https://appshunter.io/ios/app/sigma-mini/id1548367153)

This utility app connects to a specific hardware device for enhanced functionality. It allows users to interact with and control the connected device, providing a seamless experience for its intended purpose. The application is designed for users who own the associated hardware.

**Highlights:** Connects to Sigma Metalytics Mini, Device interaction and control, Enhanced functionality for users, Seamless user experience

**Features:** macOS Compatibility

**In-app purchases:** none


### Coin Tester.

[App page](https://appshunter.io/ios/app/coin-tester/id6448944215)

This app helps you verify the authenticity of one-ounce gold and silver coins using acoustic resonance and artificial intelligence. It analyzes the unique sound a coin makes when struck to detect counterfeits. Regular updates ensure accuracy for various coin types and conditions.

**Highlights:** Acoustic resonance coin testing, Artificial intelligence analysis, Detects counterfeit coins, Supports gold and silver bullion coins, Database of coin vintages, Regular updates for accuracy

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $9.00 | per month |
| Annual Access | $72.00 | per year |
| 7-Day Access | $19.00 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- ✅ Accurate coin authenticity verification
- 🚀 Fast and efficient operation
- 💡 Constantly developing and updating
- ✨ Useful for checking grandfather's collection

**What reviewers complain about**

- 💰 App requires payment for features
- ❓ No mention of paid access upfront
- 💳 Monthly subscription for ping test
- 📉 Limited database of coins
- ❌ Not accurate for all coin types

**Reported bugs**

- Test results are not accurate
- App fails to identify genuine coins
- App gives positive test for non-coin objects

**Requested features**

- Expand coin database
- Improve accuracy of tests
- Clarify pricing and subscription model upfront


## Frequently asked questions

### Is Sigma Mini free?

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

### Is Coin Tester. free?

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

### Which has better reviews, Sigma Mini or Coin Tester.?

Sigma Mini is rated higher. Sigma Mini averages 5.0 out of 5 from 2 ratings, while Coin Tester. averages 4.4 from 121 ratings.

### Do Sigma Mini or Coin Tester. have ads?

Neither Sigma Mini nor Coin Tester. shows ads.

### Which is updated more often, Sigma Mini or Coin Tester.?

Sigma Mini ships an update every 2 months, and Coin Tester. monthly. Most recently, Sigma Mini was updated on September 14, 2026 and Coin Tester. on September 8, 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.*