TrueNTP
True time, honestly measured.
TrueNTP queries multiple NTP servers, computes your clock's offset with millisecond precision, and shows exactly how far your device has drifted from true time — with an honest error bar.
For people who care what time it actually is
Network admins, sysadmins, cell techs, and the incurably precise. TrueNTP cross-checks Apple, Cloudflare, NIST, and the NTP Pool against each other, weights each answer by network quality, rejects outliers, and tells you its uncertainty instead of pretending there is none.
Highlights
- Hero clock — corrected true time ticking smoothly, anchored to the monotonic clock so OS clock steps can't fool it.
- Device drift — how far ahead or behind your clock really is, from a 1/RTT-weighted multi-server offset.
- Per-server detail — stratum, offset, round-trip time, raw NTP fields, and per-sample scatter.
- Offset history — a rolling timeline of your clock's behavior.
- GNSS cross-check (pro, Android) — reads time straight from GPS satellites as an independent, offline-capable reference.
Coming soon to Google Play and the App Store.