# M Professional vs DeltaSolar

The clearest difference is review sentiment: M Professional at 14% against DeltaSolar's 0%. M Professional also leads on update cadence (every 3 weeks vs every 2 months). DeltaSolar's advantage is iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

M Professional ships an update every 3 weeks, DeltaSolar every 2 months. The most recent releases landed on July 5, 2026 and July 19, 2026 respectively.

## The numbers

| Metric | M Professional | DeltaSolar |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **14.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 20 MB | 136 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [东 李](https://appshunter.io/developer/1228988491) | [Delta Electronics, Inc.](https://appshunter.io/developer/386896582) |

## What reviewers say

### M Professional

[App page](https://appshunter.io/ios/app/m-professional/id1385941241)

Monitor and configure your solar inverter system in real-time. Request RMA services and perform daily maintenance using Bluetooth Low Energy. Stay informed about your system's status and parameters.

**Highlights:** Real-time status monitoring, Parameter configuration, RMA service requests, Daily maintenance, BLE communication

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

**In-app purchases:** none


### DeltaSolar

[App page](https://appshunter.io/ios/app/deltasolar/id1570742979)

Monitor your solar energy system's performance remotely or onsite. Track energy production, consumption, and export, with historical data for analysis. View grid and solar power voltage, frequency, and amps for comprehensive system insights.

**Highlights:** Remote Wi-Fi access, Direct onsite connection, Energy status and analysis, Production, consumption, export data, Historical performance data, Grid and solar voltage/frequency monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is M Professional free?

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

### Is DeltaSolar free?

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

### Do M Professional or DeltaSolar have ads?

Neither M Professional nor DeltaSolar shows ads.

### Which is updated more often, M Professional or DeltaSolar?

M Professional ships an update every 3 weeks, and DeltaSolar every 2 months. Most recently, M Professional was updated on July 5, 2026 and DeltaSolar on July 19, 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.*