# pH by JH vs Voltunes

The clearest difference is update cadence: Voltunes at every 3 weeks against pH by JH's every 5 months. pH by JH's advantage is iOS requirement (11.0 vs 15.0). 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.

pH by JH ships an update every 5 months, Voltunes every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | pH by JH | Voltunes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/ph-by-jh/id1297270456/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 24 MB | 148 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Jones-Hamilton Co.](https://appshunter.io/developer/1297270455) | [PT. VNEU TEKNOLOGI INDONESIA](https://appshunter.io/developer/1278711666) |

## What reviewers say

### pH by JH

[App page](https://appshunter.io/ios/app/ph-by-jh/id1297270456)

This app simplifies litter management with customized application rate calculators. Access product data sheets, news, research, and resources from the developer to optimize your investment.

**Highlights:** Customized application rate calculators, Access product data sheets, Latest news and research, Developer resources, Litter management optimization

**Features:** macOS Compatibility

**In-app purchases:** none


### Voltunes

[App page](https://appshunter.io/ios/app/voltunes/id6444087463)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is pH by JH free?

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

### Is Voltunes free?

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

### Do pH by JH or Voltunes have ads?

Neither pH by JH nor Voltunes shows ads.

### Which is updated more often, pH by JH or Voltunes?

pH by JH ships an update every 5 months, and Voltunes every 3 weeks. Most recently, pH by JH was updated on October 24, 2026 and Voltunes 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.*