# Calc pH vs Acceleration Calculator Plus

The clearest difference is price: Calc pH at Free against Acceleration Calculator Plus's $2.99. Calc pH also leads on iOS requirement (9.0 vs 17.6). Acceleration Calculator Plus's advantage is update cadence (every 20 months vs every 59 months). On ads, in-app purchases and device support there is nothing between them.

Calc pH is free to download; Acceleration Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calc pH ships an update every 59 months, Acceleration Calculator Plus every 20 months. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Calc pH | Acceleration Calculator Plus |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 59 months | **Every 20 months** |
| Size | 0 MB | 1 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZOFTERM](https://appshunter.io/developer/557950548) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Calc pH

[App page](https://appshunter.io/ios/app/calc-ph/id566354963)

**Features:** macOS Compatibility

**In-app purchases:** none


### Acceleration Calculator Plus

[App page](https://appshunter.io/ios/app/acceleration-calculator-plus/id1658922875)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calc pH free?

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

### Is Acceleration Calculator Plus free?

Acceleration Calculator Plus costs $2.99, with no in-app purchases.

### Do Calc pH or Acceleration Calculator Plus have ads?

Neither Calc pH nor Acceleration Calculator Plus shows ads.

### Which is updated more often, Calc pH or Acceleration Calculator Plus?

Calc pH ships an update every 59 months, and Acceleration Calculator Plus every 20 months. Most recently, Calc pH was updated on September 17, 2026 and Acceleration Calculator Plus on September 19, 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.*