Comparison

OTP vs Screen Test

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

Head to head
About

OTP

This app generates secure one-time passwords for two-factor authentication on your device. It supports various protocols, allows easy account setup via QR codes or manual entry, and offers robust security features like biometric locks and encrypted backups.

Highlights
  • TOTP & HOTP code generation
  • QR code scanning for setup
  • Biometric app lock (Face ID/Touch ID)
  • Encrypted data export/import
  • Account grouping and organization
  • Dark Mode support
  • iCloud sync and backup
Features
Read full description

OTP-Auth is a beautifully designed two-factor authentication (2FA) app that generates one-time passwords on your iPhone. Supporting both TOTP and HOTP protocols, it adds an essential layer of security to all your online accounts. KEY FEATURES: - Generate TOTP & HOTP verification codes offline - Scan QR codes or add accounts manually - Tap to reveal code and copy to clipboard - Face ID & Touch ID biometric app lock - Dark Mode with system, light, and dark themes - iCloud sync and backup across devices - Export & import data with AES-256-GCM encryption - Import from Google Authenticator, 2FAS, and Aegis - 60+ branded service icons with auto-matching - Account grouping with drag-and-drop reorder - Search and sort by name, type, or custom order - Modern card-style UI with smooth animations SECURITY FIRST: Your authentication secrets never leave your device or your iCloud. Encrypted exports use AES-256-GCM. Biometric authentication keeps your codes private even if someone has your phone. IMPORT & EXPORT: Easily migrate from other authenticator apps. OTP-Auth supports encrypted JSON, plain text URI, 2FAS backup, Aegis vault, and Google Authenticator QR migration. Export your data securely with password-protected encryption. ORGANIZE YOUR WAY: Group accounts into custom folders, drag and drop to reorder, and use the built-in search to find any account instantly. Hide codes by default and reveal with a tap. PERMISSIONS: Camera access is required for scanning QR codes to add accounts. Learn more about OTP verification: https://www.wikiwand.com/en/One-time_password

About

Screen Test

Features
Read full description

Check your iPhone display in seconds. Screen Test fills the screen with pure colors so dead, stuck or faded pixels stand out, and helps you test touch, burn-in and uniformity before you buy or sell a phone. Free: • Color test: white, black, red, green, blue, yellow, cyan and magenta at full brightness. Tap for the next color, long press to see its name. Premium (one-time purchase, no subscription): • No ads • Touch grid: drag over every cell to find dead touch zones • Multi-touch: see how many fingers the screen detects at once • Gradients, gray levels and checkerboard: spot burn-in, banding and uneven panels • Custom color: fill the screen with any color • Stuck pixel fixer: rapid color cycling, with a photosensitivity warning • Used iPhone check: run the tests in order, mark pass or problem with a note, share a PDF report and keep a history on your device Who it is for: • Checking a used or new iPhone before you buy it • Finding dead pixels, stuck pixels and OLED burn-in • Finding dead touch zones after a drop or a screen repair • Repair shops checking a display before and after a repair Bought Screen Test before it became free? Premium is already yours. Use "Restore purchases" in Settings if needed. Tips: clean the screen first, test dark colors in a dim room and light colors in a bright room. Languages: English, Turkish, German, Spanish, Portuguese, Japanese, French, Arabic, Ukrainian, Russian and Chinese (Simplified). To change the language, open iOS Settings, scroll to Screen Test and choose Language. Privacy: no account, no camera or microphone access. Reports stay on your device. Ads are served by Google AdMob; you can choose whether to allow tracking. The stuck pixel fixer flashes colors rapidly and is not suitable for people with photosensitive epilepsy. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://yunusgunduz.com/pp/ScreenTester-PrivacyPolicy.html

Screenshots

OTP4 screens
Screen Test4 screens

Verdict

The call

The clearest difference is in-app purchases: Screen Test at none against OTP's 1. OTP's advantage is ads (none vs shown) and device support (4 vs 1). On price and update cadence 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. OTP sells 1 one-off in-app purchase. Screen Test asks for nothing beyond the download.

UpkeepUpdate frequency

OTP ships an update every 6 months, Screen Test every 4 months. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 6 level
OTP versus Screen Test: the parameters behind the verdict, then further details
ParameterOTPScreen Test
PriceFreeFree
Rating3.6 (18 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings18 — better—
Update frequencyEvery 6 monthsEvery 4 months — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS9.3 — better16.0
Further details — not scored
Size27 MB10 MB
Age rating4+4+
Developer浩 王Yunus Gunduz

In-app purchases

1 purchases

OTP

One-time1
  • OTPAuth Premium$1.99
None

Screen Test

No in-app purchases

Questions

Is OTP free?
OTP is free to download, with in-app purchases available.
Is Screen Test free?
Screen Test is free to download, with no in-app purchases.
Do OTP or Screen Test have ads?
Screen Test shows ads; OTP does not.
Which is updated more often, OTP or Screen Test?
OTP ships an update every 6 months, and Screen Test every 4 months. Most recently, OTP was updated on October 14, 2026 and Screen Test on October 21, 2026.

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