# MARSTEK vs Enneagram

The clearest difference is price: MARSTEK at Free against Enneagram's $2.99. MARSTEK also leads on update cadence (every 2 weeks vs every 11 months) and device support. Enneagram's advantage is iOS requirement (12.0 vs 15.5). On in-app purchases there is nothing between them.

MARSTEK is free to download; Enneagram costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MARSTEK ships an update every 2 weeks, Enneagram every 11 months. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | MARSTEK | Enneagram |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.5 (11 ratings)](https://appshunter.io/ios/app/marstek/id6459365638/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 2 weeks** | Every 11 months |
| Monetization | Free | — |
| Size | 210 MB | 55 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 12+ | 12+ |
| Developer | [Hamedata Technology Co., Limited](https://appshunter.io/developer/589308586) | [Enneagramm Software](https://appshunter.io/developer/1787555698) |

## What reviewers say

### MARSTEK

[App page](https://appshunter.io/ios/app/marstek/id6459365638)

Monitor your solar energy system in real-time. Optimize for energy independence, outage protection, or savings by setting your preferences. Control your system remotely and receive instant alerts.

**Highlights:** Real-time solar energy monitoring, Customizable optimization settings, Remote system control, Instant alerts, Energy independence focus, Outage protection settings, Savings optimization

**Features:** macOS Compatibility

**In-app purchases:** none


### Enneagram

[App page](https://appshunter.io/ios/app/enneagram-test/id6739941829)

**In-app purchases:** none


## Frequently asked questions

### Is MARSTEK free?

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

### Is Enneagram free?

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

### Which is updated more often, MARSTEK or Enneagram?

MARSTEK ships an update every 2 weeks, and Enneagram every 11 months. Most recently, MARSTEK was updated on October 14, 2026 and Enneagram on September 30, 2026.

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