# MARSTEK vs PassPang

The clearest difference is update cadence: MARSTEK at every 2 weeks against PassPang's monthly. MARSTEK also leads on iOS requirement (15.5 vs 18.6). 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.

MARSTEK ships an update every 2 weeks, PassPang monthly. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | MARSTEK | PassPang |
| --- | --- | --- |
| Price | Free | Free |
| 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 | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free | — |
| Size | 210 MB | 16 MB |
| Requires iOS | **15.5** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Hamedata Technology Co., Limited](https://appshunter.io/developer/589308586) | [FiveStar AI](https://appshunter.io/developer/1872300274) |

## 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


### PassPang

[App page](https://appshunter.io/ios/app/passpang/id6758427585)

**In-app purchases:** none


## Frequently asked questions

### Is MARSTEK free?

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

### Is PassPang free?

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

### Do MARSTEK or PassPang have ads?

Neither MARSTEK nor PassPang shows ads.

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

MARSTEK ships an update every 2 weeks, and PassPang monthly. Most recently, MARSTEK was updated on October 14, 2026 and PassPang on October 10, 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.*