This depends on your inverter brand and additional devices, but some popular options include:

• SolarEdge Monitoring (for SolarEdge inverters)
• Fronius Solar.web (for Fronius inverters)
• SMA Sunny Portal (for SMA inverters)
• Enphase Enlighten (for micro-inverters)
• HomeWizard P1 Meter (for consumption monitoring in Belgium)
• Solarman or Solar-log (brand-independent systems)

Please note: some of these apps require a separate subscription or additional hardware.