# Calculator vs Secure Password Lock

The clearest difference is price: Calculator at Free against Secure Password Lock's $0.99. Calculator also leads on rating (5.0 vs 4.5) and review sentiment (100% vs 87%). Secure Password Lock's advantage is in-app purchases (none vs 2) and ratings volume (16 vs 4). On update cadence, ads, device support and iOS requirement there is nothing between them.

Calculator is free to download; Secure Password Lock costs $0.99 up front. Calculator sells 2 one-off in-app purchases. Secure Password Lock asks for nothing beyond the download.

Calculator holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 16 respectively. Written reviews point the same way: 100% of Calculator's written reviews are positive against 87% of Secure Password Lock's.

Calculator ships an update every 3 weeks, Secure Password Lock every 2 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator | Secure Password Lock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/calculator-currency-unit/id1583572133/reviews)** | [4.5 (16 ratings)](https://appshunter.io/ios/app/secure-password-lock/id6449745506/reviews) |
| Number of ratings | 4 | **16** |
| Positive reviews | **100.0% of reviews** | 87.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 19 MB | 18 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [hua-shan cheng](https://appshunter.io/developer/1019388170) | [运强 翁](https://appshunter.io/developer/1071832931) |

## What reviewers say

### Calculator

[App page](https://appshunter.io/ios/app/calculator-currency-unit/id1583572133)

This versatile tool combines a scientific calculator with currency and unit conversion capabilities. It offers a history manager, full editing options, and an intuitive interface for school, work, and daily tasks. Supports offline currency conversion.

**Highlights:** Scientific calculator functions, Currency converter with 37 currencies, Unit converter with 181 units, History manager for calculations, Offline currency conversion, Full editing options (undo/redo)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock iPad Landscape | $0.99 | one-time |
| Unlock History | $0.99 | one-time |


### Secure Password Lock

[App page](https://appshunter.io/ios/app/secure-password-lock/id6449745506)

This application helps you securely store and manage all your passwords in one place. It offers various unlock methods for quick and safe access to your accounts, from social media to banking.

**Highlights:** Local password storage, Gesture app lock, Face and fingerprint unlock, Add pictures to passwords, Custom password categories, Category management

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator free?

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

### Is Secure Password Lock free?

Secure Password Lock costs $0.99, with no in-app purchases.

### Which has better reviews, Calculator or Secure Password Lock?

Calculator is rated higher. Calculator averages 5.0 out of 5 from 4 ratings, while Secure Password Lock averages 4.5 from 16 ratings.

### Do Calculator or Secure Password Lock have ads?

Neither Calculator nor Secure Password Lock shows ads.

### Which is updated more often, Calculator or Secure Password Lock?

Calculator ships an update every 3 weeks, and Secure Password Lock every 2 weeks. Most recently, Calculator was updated on October 18, 2026 and Secure Password Lock on October 24, 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.*