# FieldBus Toolkit vs SolarMark

The clearest difference is in-app purchases: SolarMark at none against FieldBus Toolkit's 1. SolarMark also leads on ads (none vs shown). FieldBus Toolkit's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. FieldBus Toolkit sells 1 one-off in-app purchase. SolarMark asks for nothing beyond the download.

FieldBus Toolkit ships an update every 2 months, SolarMark monthly. The most recent releases landed on October 9, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | FieldBus Toolkit | 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 | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | — | Free |
| Size | 29 MB | 55 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DONGSOO LEE](https://appshunter.io/developer/1868670088) | [SolarMark Software LLC](https://appshunter.io/developer/6776062789) |

## What reviewers say

### FieldBus Toolkit

[App page](https://appshunter.io/ios/app/fieldbus-toolkit/id6758210279)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### 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 FieldBus Toolkit free?

FieldBus Toolkit is free to download, with in-app purchases available.

### Is SolarMark free?

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

### Do FieldBus Toolkit or SolarMark have ads?

FieldBus Toolkit shows ads; SolarMark does not.

### Which is updated more often, FieldBus Toolkit or SolarMark?

FieldBus Toolkit ships an update every 2 months, and SolarMark monthly. Most recently, FieldBus Toolkit was updated on October 9, 2026 and SolarMark on October 23, 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.*