Most time-tracking tools lock your team's data in someone else's cloud. Koppl doesn't. Staff clock in/out from their phone with GPS, track breaks and shifts, and request leave. Managers get monthly summaries, CSV export, and built-in EU labour-law compliance (DE/CH/AT/NL) with auto-checkout. You choose where it runs: a subscription in German data centres, or fully self-hosted on your own hardware — even a Raspberry Pi. Privacy by design, GDPR-compliant, your data stays yours.