# Calculator Pro vs LockKeys

The clearest difference is in-app purchases: Calculator Pro at none against LockKeys's 1. LockKeys's advantage is update cadence (every 4 weeks vs every 3 months) and price ($2.99 vs $6.99). On ads, device support and iOS requirement there is nothing between them.

Calculator Pro costs $6.99 and LockKeys $2.99 up front. LockKeys sells 1 one-off in-app purchase. Calculator Pro asks for nothing beyond the download.

Calculator Pro ships an update every 3 months, LockKeys every 4 weeks. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Calculator Pro | LockKeys |
| --- | --- | --- |
| Price | $6.99 | **$2.99** |
| Rating | **[3.6 (5 ratings)](https://appshunter.io/ios/app/calculator-pro-simple-app/id708077489/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Paid | — |
| Size | 25 MB | 2 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [woodsmall inc.](https://appshunter.io/developer/708077492) | [Oleg Geraimovich](https://appshunter.io/developer/661116188) |

## What reviewers say

### Calculator Pro

[App page](https://appshunter.io/ios/app/calculator-pro-simple-app/id708077489)

This app offers a stylish and functional calculator with advanced features like percent, constant, exponential, and compound interest calculations. Customize themes and decimal rounding for a personalized experience.

**Highlights:** Percent calculations, Constant calculations, Exponential calculations, Compound interest calculations, Customizable themes, Customizable display, Decimal rounding settings

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

**In-app purchases:** none


### LockKeys

[App page](https://appshunter.io/ios/app/lockkeys/id1086665753)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| "Donation to developer" | $0.99 | one-time |


## Frequently asked questions

### Is Calculator Pro free?

Calculator Pro costs $6.99, with no in-app purchases.

### Is LockKeys free?

LockKeys costs $2.99, and also offers in-app purchases.

### Do Calculator Pro or LockKeys have ads?

Neither Calculator Pro nor LockKeys shows ads.

### Which is updated more often, Calculator Pro or LockKeys?

Calculator Pro ships an update every 3 months, and LockKeys every 4 weeks. Most recently, Calculator Pro was updated on October 23, 2026 and LockKeys on October 26, 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.*