# Solarpeak vs Modbus TCP FieldKit

The clearest difference is price: Solarpeak at Free against Modbus TCP FieldKit's $5.99. Solarpeak also leads on iOS requirement (12.0 vs 18.0). Modbus TCP FieldKit's advantage is update cadence (weekly vs every 41 months). On ads, in-app purchases and device support there is nothing between them.

Solarpeak is free to download; Modbus TCP FieldKit costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Solarpeak ships an update every 41 months, Modbus TCP FieldKit weekly. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Solarpeak | Modbus TCP FieldKit |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Weekly** |
| Size | 43 MB | 13 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [E&Jtechnology](https://appshunter.io/developer/1274910981) | [Vladimir Chemeris](https://appshunter.io/developer/1854526571) |

## What reviewers say

### Solarpeak

[App page](https://appshunter.io/ios/app/solarpeak/id1639970383)

**Features:** macOS Compatibility

**In-app purchases:** none


### Modbus TCP FieldKit

[App page](https://appshunter.io/ios/app/modbus-tcp-fieldkit/id6768897913)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solarpeak free?

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

### Is Modbus TCP FieldKit free?

Modbus TCP FieldKit costs $5.99, with no in-app purchases.

### Do Solarpeak or Modbus TCP FieldKit have ads?

Neither Solarpeak nor Modbus TCP FieldKit shows ads.

### Which is updated more often, Solarpeak or Modbus TCP FieldKit?

Solarpeak ships an update every 41 months, and Modbus TCP FieldKit weekly. Most recently, Solarpeak was updated on October 16, 2026 and Modbus TCP FieldKit on October 25, 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.*