Best CHALLNA alternatives: apps like CHALLNA: Precise Server Clock

Millisecond stopwatch & timer

For study, sports, interval

Free

This utility app offers both a stopwatch and a timer with millisecond precision. It includes smart presets, lap tracking, and customizable alerts. Ideal for precise timing in sports, studies, or experiments.

Floating Clock - Server Time

Keep time in view. Chat live.

Free

This app provides precise server time, down to the millisecond, for critical events like ticketing and registration. It offers real-time viewing on your lock screen or as an overlay while using other apps, ensuring you never miss an opportunity. Customizable alerts help manage your time efficiently.

나노타임 - pip 서버시간 티켓팅 수강신청 타이머

by Nemo factory

Free

This app displays the precise server time of ticketing and course registration websites in milliseconds. It directly queries the target site's server, accounting for network delays and server clock discrepancies. Get accurate countdowns and alerts for important events without relying on your phone's standard clock.

MillisecondTimer

All‑in‑one Millisecond timer

Free

This app provides highly accurate timing tools, including a countdown timer, stopwatch, and clock, all with millisecond precision. It's designed for precise measurements in workouts, games, and everyday situations, offering background operation and seamless switching between apps.

EchoRecorder - Voice Recorder

Voice Memos,Audio,Playback

Free

This utility app allows for instant voice recording and playback. It's designed for quick reviews and saving audio for practice, rehearsals, or capturing ideas. Features include quick recording, locked recording, and automatic playback.