# Python Data Structures & Algo vs QSO Central

The clearest difference is in-app purchases: Python Data Structures & Algo at none against QSO Central's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. QSO Central sells 2 in-app purchases, starting at $2.99 per month. Python Data Structures & Algo asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Python Data Structures & Algo | 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 2 months | Every 2 months |
| Monetization | — | Freemium |
| Size | 17 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Brickhouse Technologies LLC](https://appshunter.io/developer/6781303558) |

## What reviewers say

### Python Data Structures & Algo

[App page](https://appshunter.io/ios/app/python-data-structures-and-algo/id6757224683)

**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 Python Data Structures & Algo free?

Python Data Structures & Algo 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 Python Data Structures & Algo or QSO Central have ads?

Neither Python Data Structures & Algo nor QSO Central shows ads.

### Which is updated more often, Python Data Structures & Algo or QSO Central?

Python Data Structures & Algo ships an update every 2 months, and QSO Central every 2 months. Most recently, Python Data Structures & Algo was updated on November 3, 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.*