Well developed … easy to use … fills gap in my tool belt
This APP is thoughtful in design filling a gap in my technology tool belt
With Ads
🔧 Utilities
Free
In-App PurchasesWith Ads
About
This app precisely measures your phone's clock against true time by querying multiple servers and calculating a corrected time with millisecond accuracy. It displays the corrected time, your device's drift, and an uncertainty figure, making it useful for network verification and anyone needing accurate time.
✓Precise time measurement
✓Cross-checks multiple time servers
✓Displays device clock drift
✓Shows measurement uncertainty
✓Customizable server presets
✓Offset timeline visualization
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What's New in TrueNTP
1.0
September 4, 2026
1
Subscriptions & In-App Purchases
$3.99
Pro Unlock
Removes ads and unlocks custom NTP servers.
User reviews
FAQ
What is TrueNTP?
TrueNTP measures how far your phone's clock is from true time. It queries multiple independent time servers, cross-checks their answers, and computes a corrected time with millisecond precision.
Who is TrueNTP for?
TrueNTP is for network admins verifying NTP infrastructure, cell techs checking tower timing, sysadmins chasing clock-skew errors, IT teams resyncing systems, and anyone curious about the actual time.
How does TrueNTP measure time?
It uses bursts of SNTP samples to active servers, weighted by network quality. It includes optional outlier rejection against the cross-server median and offers six curated server presets.
What information does TrueNTP show?
It displays a large clock showing corrected time, your device clock's drift (ahead, behind, or in sync), and detailed server information including refid, root delay, and dispersion.
Does TrueNTP have ads?
Yes, TrueNTP contains advertisements. It is available for free but includes ads as part of its monetization model.
Is TrueNTP available on Android?
Based on the provided data, TrueNTP is supported on iPhone and iPad. Information regarding Android availability is not specified.
How often is TrueNTP updated?
The latest version is 1.0, and it was last updated on September 4, 2026. This indicates a recent release, with future update frequency yet to be determined.
What is the privacy policy for TrueNTP?
TrueNTP has a one-page privacy policy with no accounts, analytics, or tracking. All settings and history remain on your device.
