# KCalc Lock vs MarkFleet

The clearest difference is in-app purchases: MarkFleet at none against KCalc Lock's 2. KCalc Lock's advantage is update cadence (every 3 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. KCalc Lock sells 2 in-app purchases, starting at $5.99 per month. MarkFleet asks for nothing beyond the download.

KCalc Lock ships an update every 3 days, MarkFleet every 2 months. The most recent releases landed on October 21, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | KCalc Lock | MarkFleet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (44 ratings)](https://appshunter.io/ios/app/kcalc-lock-lock-apps-and-photos/id6677031593/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 97.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Free | — |
| Size | 33 MB | 24 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [海芸 吴](https://appshunter.io/developer/1054628440) | [SIG IT solutions s.r.o.](https://appshunter.io/developer/1779918838) |

## What reviewers say

### KCalc Lock

[App page](https://appshunter.io/ios/app/kcalc-lock-lock-apps-and-photos/id6677031593)

Secure your personal data with multi-layered protection. Lock sensitive apps, photos, and files using passwords or biometrics. Features include one-tap protection, a private photo vault, and a dual privacy shield for enhanced security.

**Highlights:** Password & Biometric Protection, One-Tap App Protection, Private Photo Vault, Customizable App Icon, Dual Privacy Shield (Guest Passcode)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Lifetime Access | $39.99 | one-time |


### MarkFleet

[App page](https://appshunter.io/ios/app/markfleet/id6741511447)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KCalc Lock free?

KCalc Lock is free to download, with in-app purchases available.

### Is MarkFleet free?

MarkFleet is free to download, with no in-app purchases.

### Do KCalc Lock or MarkFleet have ads?

Neither KCalc Lock nor MarkFleet shows ads.

### Which is updated more often, KCalc Lock or MarkFleet?

KCalc Lock ships an update every 3 days, and MarkFleet every 2 months. Most recently, KCalc Lock was updated on October 21, 2026 and MarkFleet on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*