# CSI Cloud vs NEPViewer

The clearest difference is rating: NEPViewer at 2.3 against CSI Cloud's 1.5. NEPViewer also leads on update cadence (every 3 weeks vs every 2 months). CSI Cloud's advantage is iOS requirement (11.0 vs 15.0). On price, review sentiment, ratings volume and ads there is nothing between them.

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

NEPViewer holds the better App Store score, 2.3 against 1.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews split almost evenly too, at 14% and 14% positive.

CSI Cloud ships an update every 2 months, NEPViewer every 3 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CSI Cloud | NEPViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/csi-cloud/id1452785451/reviews) | **[2.3 (4 ratings)](https://appshunter.io/ios/app/nepviewer/id1480269247/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | **14.3% of reviews** | 14.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 38 MB | 62 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Canadian Solar Inc.](https://appshunter.io/developer/1452785450) | [Northern Electric & Power Inc](https://appshunter.io/developer/1202736933) |

## What reviewers say

### CSI Cloud

[App page](https://appshunter.io/ios/app/csi-cloud/id1452785451)

Monitor your Canadian Solar plant's performance remotely. Access real-time and historical data on energy production, revenue, and device status. Stay informed about your solar assets from anywhere.

**Highlights:** Real-time data access, Historical data analysis, Production energy tracking, Revenue monitoring, Device status checks, Remote network access

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is CSI Cloud free?

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

### Is NEPViewer free?

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

### Which has better reviews, CSI Cloud or NEPViewer?

NEPViewer is rated higher. CSI Cloud averages 1.5 out of 5 from 2 ratings, while NEPViewer averages 2.3 from 4 ratings.

### Do CSI Cloud or NEPViewer have ads?

Neither CSI Cloud nor NEPViewer shows ads.

### Which is updated more often, CSI Cloud or NEPViewer?

CSI Cloud ships an update every 2 months, and NEPViewer every 3 weeks. Most recently, CSI Cloud was updated on October 8, 2026 and NEPViewer on October 7, 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.*