# KOSTAL Solar App vs SEMS+

The clearest difference is review sentiment: KOSTAL Solar App at 56% against SEMS+'s 24%. SEMS+'s advantage is rating (2.4 vs 2.0) and update cadence (every 8 days vs every 3 weeks). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SEMS+ holds the better App Store score, 2.4 against 2.0. Both are backed by a comparable volume of ratings — 6 and 12 respectively. Written reviews complicate that: 56% of KOSTAL Solar App's written reviews are positive against 24% of SEMS+'s, so the app with the better star average is not the one people write more warmly about.

KOSTAL Solar App ships an update every 3 weeks, SEMS+ every 8 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | KOSTAL Solar App | SEMS+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (6 ratings)](https://appshunter.io/ios/app/kostal-solar-app/id1451610122/reviews) | **[2.4 (12 ratings)](https://appshunter.io/ios/app/sems-plus/id6755710856/reviews)** |
| Number of ratings | 6 | **12** |
| Positive reviews | **56.4% of reviews** | 24.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | Free |
| Size | 68 MB | 273 MB |
| Requires iOS | **14.5** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KOSTAL Solar Electric GmbH](https://appshunter.io/developer/961587700) | [GoodWe Technologies Co., Ltd.](https://appshunter.io/developer/833350490) |

## What reviewers say

### KOSTAL Solar App

[App page](https://appshunter.io/ios/app/kostal-solar-app/id1451610122)

Monitor your photovoltaic system remotely with this free app. View generation and consumption data, access historical information, and utilize a virtual battery feature for forecasting. Requires access to the KOSTAL solar portal and an inverter.

**Highlights:** Remote photovoltaic system monitoring, View generation and consumption data, Access historical system data, 3-day generation and consumption forecast, Virtual battery simulation, Graphical data display

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

**In-app purchases:** none


### SEMS+

[App page](https://appshunter.io/ios/app/sems-plus/id6755710856)

This application provides a comprehensive platform for managing digital energy systems. It offers real-time monitoring, energy flow visualization, and AI-powered expert guidance. Users can remotely operate devices, receive smart alerts, and integrate multiple devices for efficient energy management and performance optimization.

**Highlights:** Real-time system and device monitoring, Energy flow visualization, AI health expert guidance, Remote operation, Smart alerts, Multi-device integration

**In-app purchases:** none


## Frequently asked questions

### Is KOSTAL Solar App free?

KOSTAL Solar App is free to download, with no in-app purchases.

### Is SEMS+ free?

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

### Which has better reviews, KOSTAL Solar App or SEMS+?

SEMS+ is rated higher. KOSTAL Solar App averages 2.0 out of 5 from 6 ratings, while SEMS+ averages 2.4 from 12 ratings.

### Do KOSTAL Solar App or SEMS+ have ads?

Neither KOSTAL Solar App nor SEMS+ shows ads.

### Which is updated more often, KOSTAL Solar App or SEMS+?

KOSTAL Solar App ships an update every 3 weeks, and SEMS+ every 8 days. Most recently, KOSTAL Solar App was updated on November 2, 2026 and SEMS+ on November 5, 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.*