Kalc vs Passmaster
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalc
This utility app offers a unit converter, calculator, and world clock. Its user-friendly interface is designed for quick access to everyday calculations and conversions.
- Unit converter
- Calculator
- World clock
- Simple UI
- Quick results
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Unit Converter, Calculator, and World Clock. The simple & clean UI to get the results you need for everyday use as quickly as possible.
Passmaster
Securely store and manage all your login credentials in the cloud. Generate strong passwords, access your accounts with a single tap, and enjoy offline access to your encrypted data. Your information is protected with host-proof encryption and optional multi-factor authentication.
- Cloud-based secure storage
- Single-tap copy/paste
- TouchID/FaceID unlock
- Secure password generator
- Host-proof encryption
- Automatic backups
- Offline access
- Multi-factor authentication
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Passmaster is a simple tool for storing usernames and passwords securely in the cloud. All of your account details are encrypted with a single master password making it easy to use different passwords for each site you visit. This app provides single-tap copy to clipboard of usernames/passwords and unlocking via TouchID/FaceID. Check out the rest of the features. WORKS EVERYWHERE Passmaster works on any modern browser on all operating systems. No browser extensions or special software is required. Just browse to https://passmaster.io or use one of the free mobile apps. SECURE PASSWORD GENERATOR Use the built-in generator to create cryptographically secure random passwords for all your accounts. If any one of your passwords is compromised you can easily generate a new one while the rest of your accounts remain safe. The length and character set is configurable to match each site's requirements. STORE EVERYTHING Passmaster is designed to store usernames and passwords for all the websites you use but can store other related information as well. There's space for account numbers, security questions, website URLs, or anything else you else you might need. HOST-PROOF ENCRYPTION Your account details are for your eyes only so everything is encrypted with javascript directly on your computer or mobile device before being saved to the cloud. Only you know the master password so no one, not even the server admins, can see anything about your account details. AUTOMATIC BACKUPS Enable automatic backups to receive an email with your encrypted account details each time you make a change. This is a great way to ensure you always have a backup of your data. You can also download a backup file to your computer at any time from your account settings. OFFLINE ACCESS Passmaster uses service workers and local storage to make your account details accessible even while you are offline. Your data is automatically synced each time you use Passmaster ensuring it is available whenever you need it. PORTABLE AND DURABLE Passmaster isn't going anywhere but in the event of an extended outage you will always be able to access your accounts details from a backup. Each Passmaster backup contains an "Account Viewer" HTML file which contains everything needed to view your account data. Just open the account viewer and use it to decrypt the backup. MULTI-FACTOR AUTHENTICATION Increase the security of your account by enabling multi-factor authentication. Accessing your accounts from a new device will require a randomly generated password in addition to your master password. OPEN SOURCE Passmaster server and the mobile apps are open source and all the code is available at https://github.com/ryanjohns/passmaster. Because everything is public, you can be certain that there is no tainted or malicious code. If you want to make an improvement, please feel free. Contributions are always welcome!
Screenshots
Verdict
The clearest difference is update cadence: Kalc at every 9 days against Passmaster's every 12 months. Kalc also leads on iOS requirement (13.4 vs 15.6). Passmaster's advantage is rating (5.0 vs 4.7). On price, review sentiment, ratings volume and ads 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.
Passmaster holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews point the same way: 96% of Kalc's written reviews are positive against 100% of Passmaster's.
Kalc ships an update every 9 days, Passmaster every 12 months. The most recent releases landed on October 2, 2026 and September 27, 2026 respectively.
| Parameter | Kalc | Passmaster |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 96.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 6 — better |
| Update frequency | Every 9 days — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | YUTA OKAJIMA | Ryan Johns |
Customer experience
Kalc
Passmaster
In-app purchases
Kalc
No in-app purchases
Passmaster
No in-app purchases









