Is it Prime? vs Mininigma
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Is it Prime?
Enter any number to instantly determine if it is a prime number or not. This straightforward utility provides a quick answer to your mathematical curiosity.
- Prime number identification
- Simple number input
- Instant yes/no results
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This application serves only one function - to satisfy your curiosity when you wonder whether a given number is prime or not. You put in the number, it says yes or no. Really, that's all it does.
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!!
Screenshots
Verdict
The clearest difference is price: Is it Prime? at Free against Mininigma's $1.99. Mininigma's advantage is rating (4.6 vs 3.2) and update cadence (every 6 months vs every 74 months). On ads, in-app purchases, monetization model and device support 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
Is it Prime? is free to download; Mininigma costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mininigma holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: Mininigma has 30 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 71% of Is it Prime?'s written reviews are positive against 91% of Mininigma's.
Is it Prime? ships an update every 74 months, Mininigma every 6 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.
| Parameter | Is it Prime? | Mininigma |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 3.2 (5 ratings) | 4.6 (30 ratings) — better |
| Positive reviews | 71.4% of reviews | 90.5% of reviews — better |
| Number of ratings | 5 | 30 — better |
| Update frequency | Every 74 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Wismar | Horacio Jimenez |
Customer experience
Is it Prime?
Mininigma
Bugs and requests
Is it Prime?
Not enough reviews yet to summarise bugs or 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
Show 10 moreShow fewer
- 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
In-app purchases
Is it Prime?
No in-app purchases
Mininigma
No in-app purchases
