Mininigma vs GR Demo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mininigma
This app simulates the historical Enigma cipher machine used during WWII. It allows users to encrypt and decrypt messages, generate machine configurations from keywords, and accurately models various Enigma machine types. Interact with other applications through copy/paste functionality.
- Enigma machine simulation
- Message encryption and decryption
- Keyword-based configuration generation
- Multiple Enigma machine types supported
- Rotor and plugboard configuration
- Copy/Paste support
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Mininigma is a complete simulator of an Enigma Machine for your iPhone/iPad/iPod Touch. Basically, Enigma was a cipher machine used by the Germans during World War II for the encryption and decryption of secret messages. It looked like an old typewriter with some extra features. Being fully compatible with the real Enigma means you can also use Mininigma to decode any of the original messages which can be found on Internet. You can also generate a machine configuration based on a keyword or keyphrase. That means you'll only have to share that keyword to send a message!! Mininigma can accurately simulate different types of machines: The Enigma I, M3 and M4, Railway, G-312, or Swiss-K, with some others coming in the future. You can read more about these, as always, on the Wikipedia :) You can actually select between the different machine types and setup them as you would with a real one: choose rotors, configure them, or use a plugboard to switch letters. All at the tip of your finger. Mininigma supports Copy/Paste to allow you to interact with any other application on your device. You can even copy/paste machine configurations in an encryptable string!!
GR Demo
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GR Demo是一款方便快捷的产品演示辅助工具,主要内容为多款简易的应用demo合集,可连接Gemred团队开发的多款产品并简单演示其无线连接、数据传输等核心功能,帮助相关人员更直观地讲解产品亮点。 GR Demo is a handy product demonstration auxiliary tool, and its main content is a collection of various simple application demos. GR Demo can connect to various products developed by the GemRed team and demonstrate their core functions such as wireless connection and data transmission, helping people explain product highlights intuitively.
Screenshots
Verdict
The clearest difference is price: GR Demo at Free against Mininigma's $1.99. GR Demo also leads on update cadence (every 6 weeks vs every 6 months). Mininigma's advantage is chart position (#171 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
GR Demo is free to download; Mininigma costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mininigma ships an update every 6 months, GR Demo every 6 weeks. The most recent releases landed on September 22, 2026 and September 13, 2026 respectively.
| Parameter | Mininigma | GR Demo |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.5 (30 ratings) — better | — |
| Positive reviews | 90.3% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Every 6 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Best chart rank | #171 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 35 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Horacio Jimenez | GemRed |
Bugs and requests
Mininigma
Reported bugs
15 issues- Audio not working after latest update
- No sound from keyboard presses after update
- UI elements cut off on newer devices (iPhone X, Dynamic Island)
- App not compatible with VoiceOver screen reader
- Help and tutorials use a difficult-to-read font
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- App crashes and freezes iPad
- Incomplete download and reload issues
- Copy and paste not working with iOS 5
- Light board not working
- Ring settings may not be working
- Dials on top are finicky
- Spacing issues where words run together
- Numerals not working
- Some settings have little influence on the text
- App crashes on opening
Requested features
17 requests- Add German language support
- More Enigma models
- Add numbers to the keyboard
- Add a space bar
- Improve readability of tutorial font
Show 12 moreShow fewer
- Fix UI issues with newer devices (Dynamic Island, home gesture)
- Add VoiceOver compatibility
- Add a reset button for settings
- Add landscape mode
- Add other crypto simulators (NEMA, Jefferson wheel)
- Add more sounds
- Option to send key with ciphertext
- Create authentic style code books
- Add Enigma clock
- Add Hagelin M209
- Option to switch to a 'normal' iPhone keyboard
- Improve directions for plugboard and rotors
GR Demo
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Mininigma
No in-app purchases
GR Demo
No in-app purchases









