# DTMFdec vs Blue Box

The clearest difference is rating: Blue Box at 5.0 against DTMFdec's 3.4. Blue Box also leads on review sentiment (56% vs 33%) and update cadence (every 7 months vs every 25 months). DTMFdec's advantage is price ($2.99 vs $4.99) and iOS requirement (12.4 vs 15.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

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

Blue Box holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 33% of DTMFdec's written reviews are positive against 56% of Blue Box's.

DTMFdec ships an update every 25 months, Blue Box every 7 months. The most recent releases landed on August 15, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | DTMFdec | Blue Box |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/dtmfdec/id363385252/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/blue-box/id391832739/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 33.3% of reviews | **55.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 7 months** |
| Monetization | Paid | Paid |
| Best chart rank | #195 | **#192** |
| Size | 1 MB | 2 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jérémie Blaser](https://appshunter.io/developer/363385255) | [Sunshine Valley Systems](https://appshunter.io/developer/327149814) |

## What reviewers say

### DTMFdec

[App page](https://appshunter.io/ios/app/dtmfdec/id363385252)

**Currently charting:** #195 Top Paid · Utilities (US App Store)

This utility decodes DTMF tones, even in noisy conditions. It stores decoded numbers for easy actions like dialing, creating contacts, or copying to your clipboard for further lookup.

**Highlights:** Sensitive DTMF tone decoding, Adapts to noisy environments, Stores decoded numbers, Dial number directly, Create new contact, Add number to existing contact, Copy to pasteboard

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

**In-app purchases:** none


### Blue Box

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

**Currently charting:** #192 Top Paid · Utilities (US App Store)

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


## Frequently asked questions

### Is DTMFdec free?

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

### Is Blue Box free?

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

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

Blue Box is rated higher. DTMFdec averages 3.4 out of 5 from 5 ratings, while Blue Box averages 5.0 from 3 ratings.

### Do DTMFdec or Blue Box have ads?

Neither DTMFdec nor Blue Box shows ads.

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

DTMFdec ships an update every 25 months, and Blue Box every 7 months. Most recently, DTMFdec was updated on August 15, 2026 and Blue Box on September 11, 2026.

### Which is more popular, DTMFdec or Blue Box?

DTMFdec currently peaks at #195 in the App Store charts, and Blue Box at #192. Chart position reflects recent download velocity rather than total install base.

---

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