# Blue Box vs AudioBuffer

The clearest difference is update cadence: AudioBuffer at every 3 weeks against Blue Box's every 7 months. AudioBuffer also leads on price ($2.99 vs $4.99). Blue Box's advantage is iOS requirement (15.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Blue Box costs $4.99 and AudioBuffer $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Blue Box ships an update every 7 months, AudioBuffer every 3 weeks. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Blue Box | AudioBuffer |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/blue-box/id391832739/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 2 MB | 2 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sunshine Valley Systems](https://appshunter.io/developer/327149814) | [Collin Cunningham](https://appshunter.io/developer/314707088) |

## What reviewers say

### Blue Box

[App page](https://appshunter.io/ios/app/blue-box/id391832739)

Encode and decode DTMF signals using your device's microphone or keypad. Play back tone sequences with adjustable settings, and save them for easy recall. Explore various tone systems, including trunk control and coin signals, for educational and utility purposes.

**Highlights:** Encode/decode DTMF signals, Adjustable tone, delay, and volume, US, UK, and European tone systems, Multi-frequency and trunk control tones, Coin tone sequences (Red Box mode), Custom tone creation, Save and organize sequences

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

**In-app purchases:** none


### AudioBuffer

[App page](https://appshunter.io/ios/app/audiobuffer/id6761793483)

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

**In-app purchases:** none


## Frequently asked questions

### Is Blue Box free?

Blue Box costs $4.99, with no in-app purchases.

### Is AudioBuffer free?

AudioBuffer costs $2.99, with no in-app purchases.

### Do Blue Box or AudioBuffer have ads?

Neither Blue Box nor AudioBuffer shows ads.

### Which is updated more often, Blue Box or AudioBuffer?

Blue Box ships an update every 7 months, and AudioBuffer every 3 weeks. Most recently, Blue Box was updated on October 15, 2026 and AudioBuffer on October 2, 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.*