Wattline — Terms of Use

Last updated: 26 October 2026

Wattline is made by Samet Ateşen (Atesen Software), Türkiye. These terms describe use of the Android app. On iOS, Apple's standard application licence agreement applies, together with the applicable App Store terms.

Use and compatibility

You may use Wattline for your own solar monitoring on a phone you own or control. It is intended for adults aged 18 and over. Connect only to devices and networks you are authorised to access.

Wattline is an independent, read-only viewer for compatible Fronius Solar API v1 devices on your local network. It requires access to the inverter's enabled Solar API. Available readings depend on your inverter, meter, battery and firmware. Wattline is not affiliated with, endorsed by or an official product of Fronius International GmbH. Fronius is a trademark of its owner.

Readings and history

The app displays readings provided by the inverter and estimates some totals from readings recorded while the app is active. It is not a certified electricity meter, a billing record or a safety control. Check the inverter or a certified meter when accuracy matters. Demo readings are simulated.

History is stored on your phone. Removing a system or clearing app data removes its local history. Keep your own copies of exports you wish to retain. The app does not provide cloud access or synchronisation between devices.

Wattline Pro on Android

The free app provides one system, the live dashboard, today's chart and two days of recorded history. An optional one-time Pro purchase unlocks additional systems, extended recorded history, CSV export and wall display. The price and available benefits are shown in the app before you buy. A one-time purchase does not renew.

Google Play processes Android purchases. Its payment and refund rules apply. Restore purchases using the same Google Play account. Purchases do not transfer between Google Play and the App Store. A refunded or revoked purchase no longer grants Pro access. See Google Play's refund guidance or contact support if Pro does not unlock.

Privacy

See the Wattline privacy policy for local network access, stored readings, sharing and store billing. Wattline has no user account, advertising or analytics.

Availability and your rights

We aim to keep the app useful and correct defects, but cannot promise compatibility with every device or firmware version or uninterrupted access to your local network. To the extent permitted by law, the app is provided as available without additional warranties. Nothing in these terms excludes mandatory consumer rights or liability that the law does not allow us to exclude.

Contact

For app or purchase problems, e-mail support@atesensoftware.com. Do not send passwords or signing credentials.