Pass vs ConvertUS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pass
This app provides a secure and convenient way to authenticate users through biometric verification or one-time passwords. It simplifies the login process for various services after an initial registration.
- Biometric authentication
- One-time password (OTP) verification
- QR code scanning for registration
- Secure login for registered services
- PIN setup
- Push notification alerts
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What is Smart Login? Pass-Ni Smart Login is a convenient authentication service that verifies users via biometric authentication or OTP number using a smartphone app. How to Register for Easy Authentication Follow the instructions on the website to apply for easy authentication registration (including identity verification and app installation). Set up your PIN and decide whether to use biometric authentication during the initial app launch. Scan the QR code displayed on the registration screen using the Smart Login app. Verify the authentication request based on the authentication method: (Smartphone) Approve the authentication request received in the app (PIN or biometric authentication). (MOTP) Enter the OTP number displayed in the app on the website. After completing the easy authentication registration, you can use the Smart Login app for a more secure login. If an Error Occurs During Easy Authentication Registration If the QR code on the website registration screen has expired, registration may fail due to a time discrepancy. Please refresh the QR code and try again. If the error persists, set your device's time automatically or connect to WIFI or mobile internet for time synchronization. If You Do Not Receive the Authentication Request Message If you do not receive the authentication request notification message, press the refresh button of the registered service provider. Precautions If you enter the password incorrectly five times, the Smart Login app will be restricted for 2 minutes. If you delete the app, all registered authentication information will be deleted, so please deregister following the website instructions before deleting the app. Required Permissions Camera, Push Notifications
ConvertUS
This utility app offers instant unit conversions with a unique retro terminal interface. It supports a wide range of measurement types and includes customizable themes. The app works offline and integrates with device shortcuts for quick access.
- Instant unit conversions
- Wide range of measurement types
- Retro terminal aesthetic
- Multiple customizable themes
- Offline functionality
- Spotlight and Siri shortcuts
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ConvertUS is a fast, all-in-one unit converter with a retro terminal aesthetic. Convert anything, instantly: • Length, mass, area, volume • Temperature, pressure, energy, power • Speed, time, frequency, angle • Data sizes, fuel economy, cooking measures • Force, torque, number bases Features: • Tap any unit to set the source. Every other unit updates instantly • Multi-language support • Multiple themes including Matrix, Dracula, Sherlock, Zeus, Odin, Horus and more • Copy any result with a single tap • Works fully offline. No tracking, no accounts, no ads • Spotlight & Siri shortcuts. Just say "Open ConvertUS" Designed to be the fastest converter on your phone.
Screenshots
Verdict
The clearest difference is review sentiment: ConvertUS at 100% against Pass's 40%. ConvertUS also leads on rating (5.0 vs 3.0) and update cadence (daily vs every 3 months). Pass's advantage is iOS requirement (15.0 vs 26.2). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ConvertUS holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 40% of Pass's written reviews are positive against 100% of ConvertUS's.
Pass ships an update every 3 months, ConvertUS daily. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Pass | ConvertUS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 3 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 14 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | 유비앤티스랩 | Gondolin LLC |
Customer experience
Pass
ConvertUS
In-app purchases
Pass
No in-app purchases
ConvertUS
No in-app purchases









