# Blue Box vs SignalDesk

The clearest difference is price: SignalDesk at Free against Blue Box's $4.99. SignalDesk also leads on review sentiment (100% vs 56%) and rating (5.0 vs 4.5). Blue Box's advantage is iOS requirement (15.0 vs 18.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

SignalDesk is free to download; Blue Box costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SignalDesk holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 56% of Blue Box's written reviews are positive against 100% of SignalDesk's.

Blue Box ships an update every 7 months, SignalDesk weekly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Blue Box | SignalDesk |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/blue-box/id391832739/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/signaldesk/id6755897750/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 55.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 61 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Sunshine Valley Systems](https://appshunter.io/developer/327149814) | [SpectraSurf Communications, LLC](https://appshunter.io/developer/1667156869) |

## 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


### SignalDesk

[App page](https://appshunter.io/ios/app/signaldesk/id6755897750)

A specialized CRM designed for Internet Service Providers, offering tools for customer management, job tracking, and field technician workflows. It provides fast, mobile access to accurate data for network operators.

**Highlights:** Customer and account management, Install and service job tracking, Field technician workflows, On-site notes and documentation, Mobile access for technicians and admins, Real-time operational updates

**Features:** macOS Compatibility, Apple Watch app, 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 SignalDesk free?

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

### Which has better reviews, Blue Box or SignalDesk?

SignalDesk is rated higher. Blue Box averages 4.5 out of 5 from 4 ratings, while SignalDesk averages 5.0 from 2 ratings.

### Do Blue Box or SignalDesk have ads?

Neither Blue Box nor SignalDesk shows ads.

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

Blue Box ships an update every 7 months, and SignalDesk weekly. Most recently, Blue Box was updated on October 23, 2026 and SignalDesk 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.*