# Royal Conversion Battery vs VoltLog

The clearest difference is in-app purchases: Royal Conversion Battery at none against VoltLog's 3. Royal Conversion Battery also leads on iOS requirement (12.0 vs 16.0). VoltLog's advantage is update cadence (every 10 days vs every 12 months). On price, ads and device support there is nothing between them.

Both are free to download. VoltLog sells 3 in-app purchases, starting at $9.99 per month. Royal Conversion Battery asks for nothing beyond the download.

Royal Conversion Battery ships an update every 12 months, VoltLog every 10 days. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Royal Conversion Battery | VoltLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 10 days** |
| Size | 43 MB | 54 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sterling Power](https://appshunter.io/developer/1639822244) | [Filip Rusin](https://appshunter.io/developer/1883368937) |

## What reviewers say

### Royal Conversion Battery

[App page](https://appshunter.io/ios/app/royal-conversion-battery/id6740916550)

**Features:** macOS Compatibility

**In-app purchases:** none


### VoltLog

[App page](https://appshunter.io/ios/app/voltlog-battery-logs/id6766874761)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Yearly Pro | $39.99 | per year |
| Lifetime Pro | $99.99 | one-time |


## Frequently asked questions

### Is Royal Conversion Battery free?

Royal Conversion Battery is free to download, with no in-app purchases.

### Is VoltLog free?

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

### Do Royal Conversion Battery or VoltLog have ads?

Neither Royal Conversion Battery nor VoltLog shows ads.

### Which is updated more often, Royal Conversion Battery or VoltLog?

Royal Conversion Battery ships an update every 12 months, and VoltLog every 10 days. Most recently, Royal Conversion Battery was updated on November 8, 2026 and VoltLog on November 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.*