# Calculator Zone vs Wattmax SmartCharge

The clearest difference is iOS requirement: Calculator Zone at 12.0 against Wattmax SmartCharge's 16.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Calculator Zone | Wattmax SmartCharge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 72 MB | 96 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [AppStoneLab Technologies LLP](https://appshunter.io/developer/1003395637) | [Wattmax SmartCharge](https://appshunter.io/developer/1822294803) |

## What reviewers say

### Calculator Zone

[App page](https://appshunter.io/ios/app/calculator-zone/id6451414632)

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

**In-app purchases:** none


### Wattmax SmartCharge

[App page](https://appshunter.io/ios/app/wattmax-smartcharge/id6747673557)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator Zone free?

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

### Is Wattmax SmartCharge free?

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

### Do Calculator Zone or Wattmax SmartCharge have ads?

Neither Calculator Zone nor Wattmax SmartCharge shows ads.

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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.*