# 21energy vs ZenPro

The clearest difference is update cadence: 21energy at fortnightly against ZenPro's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

21energy ships an update fortnightly, ZenPro monthly. The most recent releases landed on September 15, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 21energy | ZenPro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | — |
| Size | 42 MB | 80 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [21energy GmbH](https://appshunter.io/developer/1741551485) | [Zendure USA INC](https://appshunter.io/developer/1592645040) |

## 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


### ZenPro

[App page](https://appshunter.io/ios/app/zenpro/id6751992049)

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

**In-app purchases:** none


## Frequently asked questions

### Is 21energy free?

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

### Is ZenPro free?

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

### Do 21energy or ZenPro have ads?

Neither 21energy nor ZenPro shows ads.

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

21energy ships an update fortnightly, and ZenPro monthly. Most recently, 21energy was updated on September 15, 2026 and ZenPro on September 20, 2026.

---

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