Sigma Mini vs 90% Silver Coin Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sigma Mini
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.
- Connects to Sigma Metalytics Mini
- Device interaction and control
- Enhanced functionality for users
- Seamless user experience
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App to be used with the Sigma Metalytics Mini
90% Silver Coin Calculator
Easily calculate the value of your 90% silver coins. Input individual coin details to determine their worth and explore alternative forms of currency for commerce.
- Calculate 90% silver coin value
- Input individual coin details
- Explore alternative currency forms
- Learn about alternative commerce
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Now, you can take all your 90% silver coins (also called junk silver) input them individually into our Silver Coin Calculator, and then purchase the items you need. This is one of many the Central Bank Digital Currencies (CBDC) alternative forms of money you can use for commerce. You can learn more at alternativecommerce.net.
Screenshots
Verdict
The clearest difference is rating: Sigma Mini at 4.0 against 90% Silver Coin Calculator's 3.0. Sigma Mini also leads on review sentiment (38% vs 17%). 90% Silver Coin Calculator's advantage is update cadence (weekly vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sigma Mini holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 38% of Sigma Mini's written reviews are positive against 17% of 90% Silver Coin Calculator's.
Sigma Mini ships an update every 2 months, 90% Silver Coin Calculator weekly. Both last shipped on November 3, 2026.
| Parameter | Sigma Mini | 90% Silver Coin Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | 3.0 (8 ratings) |
| Positive reviews | 37.5% of reviews — better | 16.7% of reviews |
| Number of ratings | 4 | 8 — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 6 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Bessette | Blake Warrington |
Customer experience
Sigma Mini
90% Silver Coin Calculator
In-app purchases
Sigma Mini
No in-app purchases
90% Silver Coin Calculator
No in-app purchases
Questions
Is Sigma Mini free?
Is 90% Silver Coin Calculator free?
Which has better reviews, Sigma Mini or 90% Silver Coin Calculator?
Do Sigma Mini or 90% Silver Coin Calculator have ads?
Which is updated more often, Sigma Mini or 90% Silver Coin Calculator?
Other comparisons
