Sigma Mini vs Rattler Scanner
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
Rattler Scanner
This app uses machine vision to read coin identification numbers from slabs. It supports live video and imported images, allowing users to quickly look up coin prices and certification details online without manual entry.
- Reads coin identification numbers from slabs
- Supports PCGS, NGC, and CACG slabs
- Live video text recognition
- Import image for recognition
- Pan and zoom for precise identification
- Direct links to price guides and certification info
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This app is designed to read coin identification numbers using machine vision off of coin slabs. This was originally designed to read PCGS rattler slab numbers but it will also read numbers off any slab from PCGS, NGC or CACG. Live video text recognition is supported as well as importing an image. If multiple coin identifiers are detected, the user can pan and zoom the image to isolate the picture to one specific slab. No more typing in numbers manually! Once a coin ID and/or serial number are detected, the buttons at the top of the app allow navigating to the proper website (or installed app) to look up the price guide or certification information.
Screenshots
Verdict
The clearest difference is device support: Sigma Mini at 3 against Rattler Scanner's 1. Sigma Mini also leads on iOS requirement (11.0 vs 16.4). On price, rating, ratings volume and update cadence 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.
On the App Store both sit at effectively the same score — 5.0 for Sigma Mini against 5.0 for Rattler Scanner. Both are backed by a comparable volume of ratings — 2 and 5 respectively.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.
| Parameter | Sigma Mini | Rattler Scanner |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (5 ratings) |
| Positive reviews | 37.5% of reviews | — |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Bessette | Bytes and Bounty, LLC |
Customer experience
Sigma Mini
Rattler Scanner
In-app purchases
Sigma Mini
No in-app purchases
Rattler Scanner
No in-app purchases
Questions
Is Sigma Mini free?
Is Rattler Scanner free?
Which has better reviews, Sigma Mini or Rattler Scanner?
Do Sigma Mini or Rattler Scanner have ads?
Which is updated more often, Sigma Mini or Rattler Scanner?
Other comparisons
