# SmartKey vs BatteryGuard

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

Both are free to download. BatteryGuard sells 2 in-app purchases, starting at $3.99 per month. SmartKey asks for nothing beyond the download.

SmartKey ships an update every 2 months, BatteryGuard every 3 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SmartKey | BatteryGuard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 4 MB | 24 MB |
| Requires iOS | 16.4 | **16.2** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Geo Taxi LLC](https://appshunter.io/developer/1479129662) | [Mohsin Chowdhury](https://appshunter.io/developer/1872163675) |

## What reviewers say

### SmartKey

[App page](https://appshunter.io/ios/app/smartkey-access-control/id6469455536)

**Features:** macOS Compatibility

**In-app purchases:** none


### BatteryGuard

[App page](https://appshunter.io/ios/app/batteryguard-battery-care/id6809215532)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BatteryGuard | $3.99 | per month |
| BatteryGuard | $19.99 | per year |


## Frequently asked questions

### Is SmartKey free?

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

### Is BatteryGuard free?

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

### Do SmartKey or BatteryGuard have ads?

Neither SmartKey nor BatteryGuard shows ads.

### Which is updated more often, SmartKey or BatteryGuard?

SmartKey ships an update every 2 months, and BatteryGuard every 3 weeks. Most recently, SmartKey was updated on October 27, 2026 and BatteryGuard 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.*