Comparison

QuantumPass vs Libre Key Companion

Price, ratings, monetisation and update history for both apps, side by side โ€” 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 โ€ข 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. โ€ข 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. โ€ข QRNG: 1 to 100 random bits, in binary, decimal, hexadecimal or Base64. โ€ข Blockchain RNG: 128 to 512-bit values in Hex, Base64 or Base58, for your keys and seeds. โ€ข All these values come from Apple's cryptographic generator. UNDERSTAND โ€ข BB84 demo: follow the key exchange between Alice and Bob, and watch Eve the eavesdropper given away by the error rate. โ€ข Qubit Lab: measure a simulated qubit in the Z or X basis and watch the statistics build up. โ€ข Bloch sphere: set the ฮธ angle and compare theoretical probabilities with measured frequencies. โ€ข Reproducible mode: a seed to replay the same demonstration, in class or in a workshop. โ€ข PRNG vs TRNG: two animated panels to see the difference between simulated and hardware randomness. โ€ข Built-in tutorial and a 10-question quiz. PRACTICAL โ€ข Secure clipboard: whatever you copy stays on the device and is cleared after 60 seconds. โ€ข In French and English, on iPhone, iPad and Mac. โ€ข 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

Libre Key Companion

This app transforms your iPhone into a manager for hardware security keys. It supports various key types, allowing you to manage one-time passcodes, FIDO2/passkeys, PIV, and OpenPGP credentials via NFC or USB-C.

Highlights
  • Manage OATH TOTP/HOTP credentials
  • Support for Token2 on-device OTP
  • FIDO2/passkey management
  • PIV and OpenPGP key details
  • FIDO metadata lookup
  • NFC and USB-C transport support
Features
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Libre Key Companion turns your iPhone into a manager for hardware security keys. Tap your key to NFC or plug it into USB-C and work with everything it stores โ€” from a single, free, ad-free app. WHAT YOU CAN DO โ€ข One-time passcodes (OATH) โ€” list TOTP/HOTP credentials with live codes, add new ones by scanning a QR code or pasting an otpauth:// link, and delete the ones you no longer need. Works with the standard YKOATH applet used by YubiKey-class and compatible keys. โ€ข Token2 on-device OTP โ€” list, add, and remove TOTP entries stored directly on Token2 FIDO keys, including touch-required profiles. โ€ข FIDO2 / passkeys โ€” read your authenticator's details, set or change its PIN, toggle always-require-user-verification, and view or delete passkeys with full per-passkey details. (FIDO2 management is available over NFC.) โ€ข PIV and OpenPGP โ€” view certificate slots, key details, and PIN retry counters. โ€ข FIDO metadata โ€” resolve your key's model name, icon, and certification level (e.g. FIDO Certified L2) from the FIDO Alliance metadata service, with an in-app update to refresh the catalog. TRANSPORTS โ€ข NFC โ€” works with every supported applet. Hold your key to the top of the phone. โ€ข USB-C โ€” read OATH, Token2 OTP, PIV, and OpenPGP by plugging the key in; the app detects it automatically. (FIDO2 management is NFC only on iOS.) PRIVACY FIRST No account. No analytics. No ads. No tracking. Codes and key data are shown on screen only and never leave your device. The single optional network request downloads the public FIDO Alliance metadata file and sends none of your data. Libre Key Companion is provided by Token2.

Screenshots

QuantumPass4 screens
Libre Key Companion4 screens

Verdict

The call

The clearest difference is in-app purchases: Libre Key Companion at none against QuantumPass's 3. Libre Key Companion also leads on update cadence (every 3 weeks vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

QuantumPass ships an update every 10 months, Libre Key Companion every 3 weeks. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

Scorecard2 real differences ยท 6 level
QuantumPass versus Libre Key Companion: the parameters behind the verdict, then further details
ParameterQuantumPassLibre Key Companion
PriceFreeFree
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 10 monthsEvery 3 weeks โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
Monetizationโ€”Free
DevicesiPhone, iPad, Mac โ€” betteriPhone, iPad
Requires iOS17.616.0 โ€” better
Further details โ€” not scored
Size3 MB2 MB
Age rating4+4+
DeveloperValerie OteroTOKEN2 MULTIFACTOR AUTHENTICATION PRODUCTS AND SERVICES LTD

In-app purchases

3 purchases

QuantumPass

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

Libre Key Companion

No in-app purchases

Questions

Is QuantumPass free?
QuantumPass is free to download, with in-app purchases available.
Is Libre Key Companion free?
Libre Key Companion is free to download, with no in-app purchases.
Do QuantumPass or Libre Key Companion have ads?
Neither QuantumPass nor Libre Key Companion shows ads.
Which is updated more often, QuantumPass or Libre Key Companion?
QuantumPass ships an update every 10 months, and Libre Key Companion every 3 weeks. Most recently, QuantumPass was updated on October 6, 2026 and Libre Key Companion on October 20, 2026.

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