TrueOffset vs Pro Reaction Test

TrueOffset is a precision time utility for comparing time sources and measuring clock offset with clarity and confidence. Compare multiple Network Time Protocol (NTP) servers, visualize the difference between them, and see how your device's clock aligns with selected references. A clean, instrument-style interface presents time as a measurement—focused on accuracy, not decoration. FOUR CLOCK FACES - 12-Hour Classic — Traditional analog display - 24-Hour Scientific — Full day on one dial - NTP Offset — Dual second hands show device vs. true time - Digital — Large display with millisecond precision UTC & TAI TIME SCALES Display Coordinated Universal Time (UTC) and International Atomic Time (TAI) alongside your local time. UTC and TAI feature authentic deadbeat second hands that step crisply to each second, visually distinct from the smooth-sweep local time. TAI runs 37 leap seconds ahead of UTC—see both atomic time scales at a glance. PRECISION VISUALIZATION The NTP Offset view displays two second hands: your device clock (gray) and true NTP time (green). The offset magnifier shows drift on a ±10ms scale, so you can see sub-millisecond accuracy at a glance. DUAL-STACK COMPARISON A feature no other NTP app offers: compare IPv4 and IPv6 paths to the same server. Detect DNS misconfigurations, identify when address families route to different servers, and verify your network is delivering consistent time on both stacks. FLEXIBLE TIME SOURCES Compare against Apple, Google, Cloudflare, NIST, US Naval Observatory, global NTP pools, or add your own servers. Set any source as your reference and track offsets across all configured servers. QUALITY ANALYTICS Eight swipeable chart pages reveal the character of your time sources: - Dashboard — Sparkline overview of all servers - Offset History — Track drift over time - Histogram — Offset distribution analysis - Box Plot — Compare consistency across servers - RTT Scatter — Correlate latency with offset - Clock Sources — Decode reference clocks (GPS, PPS, Rubidium, Cesium) - Dual-Stack — IPv4 vs IPv6 path comparison - Rankings — Servers scored by jitter and round-trip time TrueOffset is designed for users who care about how accurate their time really is—and want to see the difference, not just trust it. --- In appreciation of Emerald Sequoia's Emerald Time.

How fast can you react? How much can you remember? Take on a new challenge every day. THREE NEW GAMES Quick Brake: tap the lightning, but hold still for the hand. Direction Switch: follow the arrow or choose its opposite. Spatial Memory: remember the lit tiles and find them after they fade. SAME CODE, SAME PUZZLES Daily challenges rotate between games. Share your real score as a portrait or square image with a challenge code. Friends enter that code in the app to play the same puzzles. A QR code links to the download. This is an offline shared challenge, not live online matchmaking. SIX CLASSIC TESTS Visual reaction, audio reaction, number flash, sequence tapping, aim training and Stroop color interference. Track your best results and revisit past sessions. A daily three-test plan prioritizes unfinished tests and lower scores. ONE PHONE, TWO PLAYERS Take turns in a five-round reaction duel. The lower average time wins, with no friend account required. YOUR PROGRESS, MADE VISIBLE Build a challenge streak, follow seven days of activity and earn exploration milestones. Review your Reaction Profile and ability chart. Optionally sign in to Game Center for classic weekly leaderboards. New games keep separate scores. LIFETIME PRO Try classic tests and standard challenges for free within daily limits. Pro adds three difficulty levels, unlimited challenges and classic training, full insights, 90-day trends and refreshed training plans. Existing Lifetime Pro owners receive the new benefits at no additional purchase. No subscription or automatic renewal. See the app for your local price. No ads. Personal records stay on your device. Insights need relevant results; player percentiles require a Game Center leaderboard entry. Restoring a purchase does not restore deleted local training records. For casual challenges and personal performance tracking, not medical diagnosis, health screening or professional certification.