# MARSTEK vs Nyx Vault

The clearest difference is in-app purchases: MARSTEK at none against Nyx Vault's 2. Nyx Vault's advantage is iOS requirement (13.0 vs 15.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Nyx Vault sells 2 in-app purchases, starting at $4.99 per month. MARSTEK asks for nothing beyond the download.

MARSTEK ships an update every 2 weeks, Nyx Vault fortnightly. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | MARSTEK | Nyx Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (13 ratings)](https://appshunter.io/ios/app/marstek/id6459365638/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 35.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free | — |
| Size | 212 MB | 40 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Hamedata Technology Co., Limited](https://appshunter.io/developer/589308586) | [Angelo Nartey](https://appshunter.io/developer/1831664919) |

## 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


### Nyx Vault

[App page](https://appshunter.io/ios/app/nyx-vault/id6757953478)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nyx Unlimited | $4.99 | per month |
| Nyx_Unlimited | $39.99 | per year |


## Frequently asked questions

### Is MARSTEK free?

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

### Is Nyx Vault free?

Nyx Vault is free to download, with in-app purchases available.

### Do MARSTEK or Nyx Vault have ads?

Neither MARSTEK nor Nyx Vault shows ads.

### Which is updated more often, MARSTEK or Nyx Vault?

MARSTEK ships an update every 2 weeks, and Nyx Vault fortnightly. Most recently, MARSTEK was updated on October 23, 2026 and Nyx Vault on October 20, 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.*