# AUDIO.SYNC vs PhosphorCalc

The clearest difference is price: PhosphorCalc at $0.99 against AUDIO.SYNC's $3.99. AUDIO.SYNC's advantage is iOS requirement (18.6 vs 26.2). On ads, in-app purchases and device support there is nothing between them.

AUDIO.SYNC costs $3.99 and PhosphorCalc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | AUDIO.SYNC | PhosphorCalc |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 66 MB | 1 MB |
| Requires iOS | **18.6** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Bolus](https://appshunter.io/developer/1822360740) | [Stuart Woolley](https://appshunter.io/developer/315697638) |

## What reviewers say

### AUDIO.SYNC

[App page](https://appshunter.io/ios/app/audiosync/id6747685672)

**In-app purchases:** none


### PhosphorCalc

[App page](https://appshunter.io/ios/app/phosphorcalc/id6760777378)

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

**In-app purchases:** none


## Frequently asked questions

### Is AUDIO.SYNC free?

AUDIO.SYNC costs $3.99, with no in-app purchases.

### Is PhosphorCalc free?

PhosphorCalc costs $0.99, with no in-app purchases.

### Do AUDIO.SYNC or PhosphorCalc have ads?

Neither AUDIO.SYNC nor PhosphorCalc shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*