# AlexCalc vs VoltLog

The clearest difference is in-app purchases: AlexCalc at none against VoltLog's 3. AlexCalc also leads on update cadence (daily vs every 10 days). VoltLog's advantage is iOS requirement (16.0 vs 18.6). 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. AlexCalc asks for nothing beyond the download.

AlexCalc ships an update daily, VoltLog every 10 days. Both last shipped on November 9, 2026.

## The numbers

| Metric | AlexCalc | VoltLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 10 days |
| Size | 25 MB | 54 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ALEXANDER HAMILTON BARRY](https://appshunter.io/developer/1895830197) | [Filip Rusin](https://appshunter.io/developer/1883368937) |

## What reviewers say

### AlexCalc

[App page](https://appshunter.io/ios/app/alexcalc/id6764553315)

**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 AlexCalc free?

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

### Is VoltLog free?

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

### Do AlexCalc or VoltLog have ads?

Neither AlexCalc nor VoltLog shows ads.

### Which is updated more often, AlexCalc or VoltLog?

AlexCalc ships an update daily, and VoltLog every 10 days. Most recently, AlexCalc was updated on November 9, 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.*