# Boat Units vs SolarMark

The clearest difference is update cadence: Boat Units at every 3 days against SolarMark's monthly. SolarMark's advantage is iOS requirement (15.1 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.

Boat Units ships an update every 3 days, SolarMark monthly. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Boat Units | SolarMark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/solarmark/id6776068343/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | — | Free |
| Size | 7 MB | 55 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marcus Johansson](https://appshunter.io/developer/1659201231) | [SolarMark Software LLC](https://appshunter.io/developer/6776062789) |

## What reviewers say

### Boat Units

[App page](https://appshunter.io/ios/app/boat-units/id1659201229)

**Features:** macOS Compatibility

**In-app purchases:** none


### SolarMark

[App page](https://appshunter.io/ios/app/solarmark/id6776068343)

Monitor your solar power generation and battery storage systems locally and privately. Visualize real-time energy flow, get intelligent predictions, and receive protection alerts without relying on cloud services.

**Highlights:** Direct Modbus TCP polling, Live power flow dashboard, Multi-device infrastructure management, Localized weather-based generation predictions, On-device analytics ledger, Open data export (CSV), Protection alerts (no-generation, performance, thermal)

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

**In-app purchases:** none


## Frequently asked questions

### Is Boat Units free?

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

### Is SolarMark free?

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

### Do Boat Units or SolarMark have ads?

Neither Boat Units nor SolarMark shows ads.

### Which is updated more often, Boat Units or SolarMark?

Boat Units ships an update every 3 days, and SolarMark monthly. Most recently, Boat Units was updated on October 12, 2026 and SolarMark on October 6, 2026.

---

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