Watto vs Smongle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watto
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- Hourly prices for EPEX SPOT AT and DE - Shows you the best times to charge - Calculates the real price based on your fee structure - Alerts you when the price drops below a set limit - See historical data like average price per week and best weekday
Smongle
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Smongle® – The Plug & Play Energy System from Austria Smongle® combines real-time energy data, intelligent device control, smart home functionality and energy communities in a single platform. Monitor your electricity consumption, feed-in and energy flows at any time and expand your system with the growing Smongle® Ecosystem. From energy monitoring and automation to intelligent energy management, Smongle® makes complex energy technology simple. Smongle® offers: • Live energy data directly from your existing smart meter • Real-time monitoring of consumption, feed-in and power • Cloud-based Energy Management System (EMS) from Austria • Centralized control and configuration of all Smongle® devices • Plug & Play setup of new devices in just a few steps • Full transparency of energy consumption and feed-in within energy communities • Overview of available surplus energy • Automatic synchronization and intelligent cloud services • No account required – simply log in using your Smongle® serial number and GUEK provided by your grid operator • Continuously expanding Smongle® Ecosystem for intelligent home energy management With just a few steps, Smongle® becomes a powerful energy management system for homes, businesses and energy communities. One System. One App. Everything Connected. Plug & Play for Everyone. New: Smongle® and expansion devices will soon be available independently of energy community memberships. Devices can be purchased through the official online shop, including prepaid cloud services. Note: An internet connection is required for operation. If community data is not visible, please contact your administrator for activation. The more active Smongle® devices are connected within an energy community, the more accurate the shared energy data becomes.
Screenshots
Verdict
The clearest difference is in-app purchases: Smongle at none against Watto's 4. Smongle also leads on update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement 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. Watto sells 4 one-off in-app purchases. Smongle asks for nothing beyond the download.
Watto ships an update every 2 months, Smongle fortnightly. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.
| Parameter | Watto | Smongle |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Aigner | mechsat e.U. |
In-app purchases
Watto
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$3.99
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- Extra Large Tip$8.99
Smongle
No in-app purchases









