# Overtime Calculator plus vs VOLTA ENERGY

The clearest difference is update cadence: VOLTA ENERGY at every 2 days against Overtime Calculator plus's every 17 months. Overtime Calculator plus's advantage is iOS requirement (11.0 vs 13.0). 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.

Overtime Calculator plus ships an update every 17 months, VOLTA ENERGY every 2 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Overtime Calculator plus | VOLTA ENERGY |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 days** |
| Size | 31 MB | 10 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AMAR AWNI](https://appshunter.io/developer/1551109915) | [胜 周](https://appshunter.io/developer/1738347526) |

## What reviewers say

### Overtime Calculator plus

[App page](https://appshunter.io/ios/app/overtime-calculator-plus/id1615042862)

**Features:** macOS Compatibility

**In-app purchases:** none


### VOLTA ENERGY

[App page](https://appshunter.io/ios/app/volta-energy/id6502325019)

**In-app purchases:** none


## Frequently asked questions

### Is Overtime Calculator plus free?

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

### Is VOLTA ENERGY free?

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

### Do Overtime Calculator plus or VOLTA ENERGY have ads?

Neither Overtime Calculator plus nor VOLTA ENERGY shows ads.

### Which is updated more often, Overtime Calculator plus or VOLTA ENERGY?

Overtime Calculator plus ships an update every 17 months, and VOLTA ENERGY every 2 days. Most recently, Overtime Calculator plus was updated on November 3, 2026 and VOLTA ENERGY on November 4, 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.*