# MTP Callsign Trainer vs QSO Central

The clearest difference is in-app purchases: MTP Callsign Trainer at none against QSO Central's 2. MTP Callsign Trainer also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. QSO Central sells 2 in-app purchases, starting at $2.99 per month. MTP Callsign Trainer asks for nothing beyond the download.

MTP Callsign Trainer ships an update every 6 weeks, QSO Central every 2 months. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MTP Callsign Trainer | QSO Central |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/qso-central/id6782027339/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 49 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oliver Bross](https://appshunter.io/developer/1859081127) | [Brickhouse Technologies LLC](https://appshunter.io/developer/6781303558) |

## What reviewers say

### MTP Callsign Trainer

[App page](https://appshunter.io/ios/app/mtp-callsign-trainer/id6758036106)

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

**In-app purchases:** none


### QSO Central

[App page](https://appshunter.io/ios/app/qso-central/id6782027339)

Prepare for amateur radio licensing exams with comprehensive study tools, including flashcards and practice tests. Access offline station utilities for band plans, antenna calculations, and Morse code training. Optional features provide live data for satellite tracking and callsign lookups.

**Highlights:** Offline license exam preparation, Satellite tracking and pass prediction, U.S. Band Plan and privilege display, Antenna and electrical calculators, Morse code trainer, Offline logbook with ADIF/CSV export, FCC rules and plain-language summaries

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DX+ Log Upload Monthly | $2.99 | per month |
| DX+ Log Upload Monthly | $19.99 | per year |


## Frequently asked questions

### Is MTP Callsign Trainer free?

MTP Callsign Trainer is free to download, with no in-app purchases.

### Is QSO Central free?

QSO Central is free to download, with in-app purchases available.

### Do MTP Callsign Trainer or QSO Central have ads?

Neither MTP Callsign Trainer nor QSO Central shows ads.

### Which is updated more often, MTP Callsign Trainer or QSO Central?

MTP Callsign Trainer ships an update every 6 weeks, and QSO Central every 2 months. Most recently, MTP Callsign Trainer was updated on October 25, 2026 and QSO Central on November 5, 2026.

---

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