# 21energy vs SoundPull

The clearest difference is price: 21energy at Free against SoundPull's $1.99. 21energy also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

21energy is free to download; SoundPull costs $1.99 up front. SoundPull sells 1 one-off in-app purchase. 21energy asks for nothing beyond the download.

21energy ships an update fortnightly, SoundPull every 10 days. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 21energy | SoundPull |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | — |
| Size | 43 MB | 35 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [21energy GmbH](https://appshunter.io/developer/1741551485) | [Kohei Omori](https://appshunter.io/developer/1886931034) |

## What reviewers say

### 21energy

[App page](https://appshunter.io/ios/app/21energy/id6497953701)

Easily set up and configure your Ofen and Ofen Pro heaters. Connect your device via Bluetooth to your local WiFi and manage your mining pool settings with just a few taps.

**Highlights:** Easy setup and configuration, Bluetooth connectivity, WiFi connection, Mining pool configuration, Ofen and Ofen Pro support

**In-app purchases:** none


### SoundPull

[App page](https://appshunter.io/ios/app/soundpull-extract-audio/id6780130646)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Extractions | $2.99 | one-time |


## Frequently asked questions

### Is 21energy free?

21energy is free to download, with no in-app purchases.

### Is SoundPull free?

SoundPull costs $1.99, and also offers in-app purchases.

### Do 21energy or SoundPull have ads?

Neither 21energy nor SoundPull shows ads.

### Which is updated more often, 21energy or SoundPull?

21energy ships an update fortnightly, and SoundPull every 10 days. Most recently, 21energy was updated on October 3, 2026 and SoundPull on October 11, 2026.

---

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