TommaTech vs Retgen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TommaTech
Monitor your inverter's real-time performance, including power generation and consumption. Analyze operational data at a minute level to ensure optimal inverter function.
- Real-time inverter data viewing
- Minute-level statistical analysis
- Online status tracking
- Power generation monitoring
- Power consumption tracking
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Tommatech app can view the data reported by the inverter in real time, conduct minute level statistical analysis on whether the inverter is online, power generation, power consumption and on-line power, and master the operation of the inverter in time.
Retgen
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Retgen is a Remote Monitoring System for Power Plants. It allows you to monitor real-time production, consumption, inverter outputs, statuses, and many other data of solar power plants (GES), rooftop solar systems, wind power plants (RES), hydroelectric power plants (HES), or biomass power plants, as well as alarm states and faults occurring at the plants. With the Retgen mobile application: *Management Company users can view the following information of the plants they monitor: -Total production -Generated alarms -Work orders (for Management Companies with the work order module enabled) *Investor users can view the following information for their own plants: -List of plants and their total production -Generated alarms
Screenshots
Verdict
The clearest difference is update cadence: Retgen at every 11 days against TommaTech's every 6 weeks. TommaTech's advantage is iOS requirement (11.0 vs 15). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
TommaTech ships an update every 6 weeks, Retgen every 11 days. The most recent releases landed on June 8, 2026 and September 1, 2026 respectively.
| Parameter | TommaTech | Retgen |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 12.5% of reviews | — |
| Update frequency | Every 6 weeks | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15 |
| Further details — not scored | ||
| Size | 68 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | TommaTech GmbH | Rast Teknoloji |
In-app purchases
TommaTech
No in-app purchases
Retgen
No in-app purchases
