CAL_ vs KryptoVault
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CAL_
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CAL_ is the next evolution of calculators. Made especially for iPhone, it brings the venerable calculator to an all-new level. LOG FEATURE All of your calculations are logged, so you can refer to them at any time. Use the ANS key to bring up the most recent result from the log. You can toggle commas and decimal points, and also use a guide that shows you when your units are in the millions, billions, and beyond. CURRENCY CONVERSIONS Get real-time currency rates for up to three currencies at once. You can also see a graph of currency value fluctuations. UNIT CONVERSIONS Want to know how many Tokyo Domes there are to an acre? Or how many lbs make up a stone? It's right at your fingertips in CAL_.
KryptoVault
Manage your GPG/OpenPGP keys and encrypted emails directly from your mobile device. Import existing keys or generate new ones, and stay productive by reading and writing encrypted messages on the go.
- GPG/OpenPGP email management
- Read and write encrypted emails
- Import existing keys
- Generate new keys
- Key storage and management
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KryptoVault is a GPG/OpenPGP manager with email support for reading and writing encrypted emails. * Are you tired of reading your encrypted emails in your laptop? * Would you like to know the content of the message right from your mobile device? * Are you worried about managing and storing all of your keys? * Quickly import your existing keys through iTunes/Finder, AirDrop, iCloud, Mail or locally from your device or generate a your first one with KryptoVault. Then KryptoVault is for you! Stay in the loop, be productive, don't miss an important email anymore.
Screenshots
Verdict
The clearest difference is update cadence: CAL_ at every 4 days against KryptoVault's fortnightly. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CAL_ ships an update every 4 days, KryptoVault fortnightly. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.
| Parameter | CAL_ | KryptoVault |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.5 (8 ratings) — better |
| Positive reviews | — | 40.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 4 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 9 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | SQUAIR Inc. | Samuel Gonzalez |
In-app purchases
CAL_
No in-app purchases
KryptoVault
No in-app purchases








