# NEPViewer vs SEMS+

NEPViewer and SEMS+ both sit at 2.3 stars, but that hides the real split: 25% of SEMS+'s written reviews are positive against 14% of NEPViewer's. SEMS+ also leads on update cadence (every 8 days vs every 3 weeks) and ratings volume (12 vs 4). On price, rating, 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.

On the App Store both sit at effectively the same score — 2.3 for NEPViewer against 2.4 for SEMS+. Both are backed by a comparable volume of ratings — 4 and 12 respectively. Written reviews are what separate them: 14% of NEPViewer's written reviews are positive against 25% of SEMS+'s.

NEPViewer ships an update every 3 weeks, SEMS+ every 8 days. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | NEPViewer | SEMS+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (4 ratings)](https://appshunter.io/ios/app/nepviewer/id1480269247/reviews) | **[2.4 (12 ratings)](https://appshunter.io/ios/app/sems-plus/id6755710856/reviews)** |
| Number of ratings | 4 | **12** |
| Positive reviews | 14.0% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | Free |
| Size | 62 MB | 271 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northern Electric & Power Inc](https://appshunter.io/developer/1202736933) | [GoodWe Technologies Co., Ltd.](https://appshunter.io/developer/833350490) |

## What reviewers say

### NEPViewer

[App page](https://appshunter.io/ios/app/nepviewer/id1480269247)

Monitor your BDM micro inverter system in real-time. Track system output and energy harvest, or view installed systems and their performance. Requires registration on the NEPViewer website.

**Highlights:** Real-time system monitoring, Track energy harvest, View installed systems, Check system performance, Multi-language support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Intuitive and easy to use (some users)
- ✨ Modern look and feel (some users)
- ✅ App does what it's supposed to (sometimes)

**What reviewers complain about**

- 🐛 Frequent crashes and closing
- ❌ Login and password reset issues
- 📉 Inaccurate or delayed data
- 🚫 Loss of important features (panel view, daily graphs)
- 🖥️ Poor iPad/landscape support

**Reported bugs**

- App closes immediately on launch/login
- Blank error box when resetting password
- App offline frequently
- Inaccurate wattage readings
- Cannot connect to all inverters

**Requested features**

- Restore panel performance view
- Restore daily/hourly graphs and curves
- Improve iPad/landscape mode support
- Better customer support
- Option to stay logged in


### SEMS+

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

This platform provides comprehensive energy system management for GoodWe devices. It offers real-time monitoring, energy flow visualization, and AI-driven health guidance. Users can remotely operate systems, 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 NEPViewer free?

NEPViewer 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, NEPViewer or SEMS+?

SEMS+ is rated higher. NEPViewer averages 2.3 out of 5 from 4 ratings, while SEMS+ averages 2.4 from 12 ratings.

### Do NEPViewer or SEMS+ have ads?

Neither NEPViewer nor SEMS+ shows ads.

### Which is updated more often, NEPViewer or SEMS+?

NEPViewer ships an update every 3 weeks, and SEMS+ every 8 days. Most recently, NEPViewer was updated on October 15, 2026 and SEMS+ on October 16, 2026.

---

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