Comparison

QuantumPass vs Simple Diagram

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

QuantumPass

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QuantumPass brings two worlds together: a password and key generator, and a small lab to discover quantum randomness. GENERATE • Passwords from 8 to 64 characters: lowercase, uppercase, digits, symbols, ambiguous-character exclusion, forbidden characters and required characters. The estimated entropy is shown with each result. • Diceware passphrases of 3 to 10 words, in French or English depending on the app language, with the separator of your choice. Strengthen a phrase with randomly drawn capitals, substitutions and suffix. • QRNG: 1 to 100 random bits, in binary, decimal, hexadecimal or Base64. • Blockchain RNG: 128 to 512-bit values in Hex, Base64 or Base58, for your keys and seeds. • All these values come from Apple's cryptographic generator. UNDERSTAND • BB84 demo: follow the key exchange between Alice and Bob, and watch Eve the eavesdropper given away by the error rate. • Qubit Lab: measure a simulated qubit in the Z or X basis and watch the statistics build up. • Bloch sphere: set the Īø angle and compare theoretical probabilities with measured frequencies. • Reproducible mode: a seed to replay the same demonstration, in class or in a workshop. • PRNG vs TRNG: two animated panels to see the difference between simulated and hardware randomness. • Built-in tutorial and a 10-question quiz. PRACTICAL • Secure clipboard: whatever you copy stays on the device and is cleared after 60 seconds. • In French and English, on iPhone, iPad and Mac. • Tip Jar: support development right from the app. PRIVACY QuantumPass works offline. All calculations are performed on your device. No account, no ads, no data collected. QuantumPass is an educational tool: its "quantum generator" is a simulation, fed by the system's secure random source.

About

Simple Diagram

Features
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Diagram makes creating professional flowcharts and diagrams incredibly simple. • Add rectangles, ovals, diamonds, and arrows • Customize colors with beautiful gradients • Double-tap to add text to any shape • Pinch to zoom for detailed work • Export to PDF, PNG, or HTML document • Save multiple diagrams • Undo mistakes instantly Perfect for students, professionals, and anyone who needs to visualize ideas quickly.

Screenshots

QuantumPass4 screens
Simple Diagram3 screens

Verdict

The call

The clearest difference is in-app purchases: Simple Diagram at none against QuantumPass's 3. QuantumPass's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. QuantumPass sells 3 one-off in-app purchases. Simple Diagram asks for nothing beyond the download.

Scorecard2 real differences Ā· 4 level
QuantumPass versus Simple Diagram: the parameters behind the verdict, then further details
ParameterQuantumPassSimple Diagram
PriceFreeFree
Update frequencyEvery 10 months—
AdsNo — betterYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.6 — better18.4
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperValerie OteroNhat Linh Dang

In-app purchases

3 purchases

QuantumPass

One-time3
  • Small coffee$1.99
  • Medium coffee$3.99
  • Large coffee$5.99
None

Simple Diagram

No in-app purchases

Questions

Is QuantumPass free?
QuantumPass is free to download, with in-app purchases available.
Is Simple Diagram free?
Simple Diagram is free to download, with no in-app purchases.
Do QuantumPass or Simple Diagram have ads?
Simple Diagram shows ads; QuantumPass does not.

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