Comparison

Passkeys App vs Science Explorer

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

Head to head
About

Passkeys App

This app offers a secure and simple way to log into your accounts without passwords. It uses biometric authentication like Face ID or Touch ID for quick setup and effortless sign-ins, providing next-generation security and phishing protection.

Highlights
  • Passwordless sign-ins
  • Biometric authentication (Face ID/Touch ID)
  • Encrypted data storage
  • Encrypted backups
  • Cross-device synchronization
  • Phishing-proof security
Features
Read full description

Passkeys is the app that revolutionizes sign-ins for ultimate security and simplicity. Say goodbye to passwords forever! With Passkeys App, creating and using a passkey is as quick and easy as a breeze. Use Face ID or Touch ID for one-step account creation and effortless sign-ins. Features: - Strong, Secure & Private Each Passkey is inherently strong, never guessable, reused, or weak, guaranteeing top-notch protection for your accounts. All data stored in Passkeys App is encrypted, even when stored in iCloud, ensuring that only you can access your data. - Encrypted Backup In Passkeys App, you can create secure encrypted backups, providing peace of mind in case you lose your device or switch to a new one. - Synchronization Across all Devices Passkeys App automatically synchronize your accounts across all Apple devices for seamless access. - Next-Generation Security Built on FIDO Alliance and W3C standards, Passkeys replace traditional passwords with cryptographic key pairs, offering unmatched security. - Phishing-Proof Passkeys are uniquely tied to the app or website they were created for, protecting users from falling victim to fraudulent apps or websites. - And many, many other features! We constantly improve our app, don't hesitate to contact us at support@2stable.com to request a missing feature or an improvement. A subscription is required to add more than 2 accounts and unlock unlimited usage. Links Terms of Service: https://passkeys.2stable.com/terms-of-service/ Privacy: https://passkeys.2stable.com/privacy-policy/

About

Science Explorer

Features
Read full description

Science Explorer - the smart way to master science! Built for the curriculum, Science Explorer covers Year 7 through Year 10 with 8 topics, 118 levels, and 1,950+ real science questions. YEAR 7-8 TOPICS (10 levels each): - Chemistry — Atoms, elements, reactions & the periodic table (220+ questions) - Biology — Cells, body systems, ecosystems & genetics (200+ questions) - Physics — Forces, energy, electricity & motion (200+ questions) - Earth Science — Rocks, plate tectonics, weather & space (200+ questions) - Scientific Method — Experiments, variables, data & lab safety (200+ questions) YEAR 9-10 TOPICS (20 levels each): - Chemistry II — Bonding, moles, stoichiometry & organic chemistry (250+ questions) - Biology II — DNA, evolution, human physiology & disease (250+ questions) - Physics II — Waves, electromagnetism, nuclear & quantum (250+ questions) - New Space & Universe topic — 80 questions across 8 levels LEARN FROM EVERY MISTAKE: Every question includes a detailed explanation. Correct answers auto-advance so you keep your flow. Wrong answers show the solution — tap to review, then move on. SMART PLACEMENT TEST: A quick placement quiz on first launch determines your starting level automatically. GAMIFIED LEARNING: - Earn 1-3 stars on every level - Build answer streaks for bonus XP - Level up and unlock 30 achievements - Compete on the global leaderboard - Complete the daily challenge for extra rewards 1,950+ QUESTIONS across 110 levels — every quiz draws from a large pool so it's different every time. All aligned to the Curriculum. Created by A Star Learner — helping students achieve their best.

Screenshots

Passkeys App4 screens
Science Explorer4 screens

Verdict

The call

The clearest difference is in-app purchases: Science Explorer at none against Passkeys App's 3. Science Explorer also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Passkeys App sells 3 in-app purchases, starting at $2.99 per 7 days. Science Explorer asks for nothing beyond the download.

UpkeepUpdate frequency

Passkeys App ships an update fortnightly, Science Explorer every 8 days. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

Scorecard2 real differences · 8 level
Passkeys App versus Science Explorer: the parameters behind the verdict, then further details
ParameterPasskeys AppScience Explorer
PriceFreeFree
Rating4.7 (967 ratings) — better—
Positive reviews88.2% of reviews—
Number of ratings967 — better—
Update frequencyFortnightlyEvery 8 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size82 MB30 MB
Age rating4+4+
Developer2StableDung Ba Nguyen

Bugs and requests

Passkeys App

Reported bugs

2 issues
  • Login screen freezes
  • Incompatibility with certain apps

Requested features

5 requests
  • Dark mode option
  • More customization settings
  • Additional security features
  • Enhanced password generator
  • Improved mobile app stability

Science Explorer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Passkeys App

Subscriptions3
  • Passkeys3 Days trial$2.997 Days
  • Passkeys$5.991 Month
  • Passkeys$19.991 Year
None

Science Explorer

No in-app purchases

Questions

Is Passkeys App free?
Passkeys App is free to download, with in-app purchases available.
Is Science Explorer free?
Science Explorer is free to download, with no in-app purchases.
Do Passkeys App or Science Explorer have ads?
Neither Passkeys App nor Science Explorer shows ads.
Which is updated more often, Passkeys App or Science Explorer?
Passkeys App ships an update fortnightly, and Science Explorer every 8 days. Most recently, Passkeys App was updated on September 23, 2026 and Science Explorer on September 14, 2026.

Other comparisons