# PCalc vs Auto Audio

The clearest difference is price: Auto Audio at $0.99 against PCalc's $9.99. Auto Audio also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.0). PCalc's advantage is chart position (#37 vs unranked). On update cadence, ads and device support there is nothing between them.

PCalc costs $9.99 and Auto Audio $0.99 up front. PCalc sells 4 one-off in-app purchases. Auto Audio asks for nothing beyond the download.

PCalc ships an update every 6 weeks, Auto Audio every 4 weeks. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PCalc | Auto Audio |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| Rating | **[4.7 (770 ratings)](https://appshunter.io/ios/app/pcalc/id284666222/reviews)** | — |
| Number of ratings | **770** | — |
| Positive reviews | 83.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#37** | — |
| Size | 81 MB | 4 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch, Vision Pro** | iPhone, iPad, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [TLA Systems Ltd.](https://appshunter.io/developer/284666225) | [方 沈](https://appshunter.io/developer/882296318) |

## What reviewers say

### PCalc

[App page](https://appshunter.io/ios/app/pcalc/id284666222)

**Currently charting:** #37 Top Paid · Utilities (US App Store)

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

**Highlights:** Optional RPN mode, Multi-line display, Extensive unit conversions, Paper tape, Multiple undo/redo, Hexadecimal, octal, binary support, Apple Watch app

**Features:** Apple Watch app, iMessage stickers

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Enormous Tip | $9.99 | one-time |


### Auto Audio

[App page](https://appshunter.io/ios/app/auto-audio/id884502711)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PCalc free?

PCalc costs $9.99, and also offers in-app purchases.

### Is Auto Audio free?

Auto Audio costs $0.99, with no in-app purchases.

### Do PCalc or Auto Audio have ads?

Neither PCalc nor Auto Audio shows ads.

### Which is updated more often, PCalc or Auto Audio?

PCalc ships an update every 6 weeks, and Auto Audio every 4 weeks. Most recently, PCalc was updated on September 24, 2026 and Auto Audio on September 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.*