# Math keyboard vs Audio Compressor

The clearest difference is review sentiment: Math keyboard at 100% against Audio Compressor's 0%. Math keyboard also leads on rating (5.0 vs 3.0) and ads (none vs shown). Audio Compressor's advantage is price (Free vs $0.99) and update cadence (weekly vs monthly). On ratings volume, in-app purchases, device support and iOS requirement there is nothing between them.

Audio Compressor is free to download; Math keyboard costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Math keyboard holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 100% of Math keyboard's written reviews are positive against 0% of Audio Compressor's.

Math keyboard ships an update monthly, Audio Compressor weekly. The most recent releases landed on July 6, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Math keyboard | Audio Compressor |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/math-keyboard-calcuboard/id6744564198/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/audio-compressor-mp3-reducer/id6748247625/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Weekly** |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#167** | — |
| Size | 3 MB | 55 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nikolai Rodionov](https://appshunter.io/developer/1123457016) | [Suman Sharma](https://appshunter.io/developer/1815967200) |

## What reviewers say

### Math keyboard

[App page](https://appshunter.io/ios/app/math-keyboard-calcuboard/id6744564198)

**Currently charting:** #167 Top Paid · Utilities (US App Store)

Perform calculations directly from your keyboard without switching apps. This smart helper allows quick math while chatting, taking notes, or entering data. It features calculator memory to save and reuse values, enhancing productivity.

**Highlights:** Built-in calculator keyboard, Calculator memory function, No app switching required, Supports basic and advanced operations, Minimalist design for productivity

**Features:** macOS Compatibility

**In-app purchases:** none


### Audio Compressor

[App page](https://appshunter.io/ios/app/audio-compressor-mp3-reducer/id6748247625)

Easily reduce the size of audio files like MP3, M4A, AAC, and WAV without sacrificing quality. This app offers batch processing, preview options, and various compression settings to save space and share audio faster.

**Highlights:** Compress multiple audio files, Preview before and after compression, Adjust compression level and bitrate, Apply fade in/out effects, Mono/Stereo conversion, Volume normalization, Batch processing

**In-app purchases:** none


## Frequently asked questions

### Is Math keyboard free?

Math keyboard costs $0.99, with no in-app purchases.

### Is Audio Compressor free?

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

### Which has better reviews, Math keyboard or Audio Compressor?

Math keyboard is rated higher. Math keyboard averages 5.0 out of 5 from 4 ratings, while Audio Compressor averages 3.0 from 2 ratings.

### Do Math keyboard or Audio Compressor have ads?

Audio Compressor shows ads; Math keyboard does not.

### Which is updated more often, Math keyboard or Audio Compressor?

Math keyboard ships an update monthly, and Audio Compressor weekly. Most recently, Math keyboard was updated on July 6, 2026 and Audio Compressor on September 21, 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.*