# BoxClock — Complete Reference Last updated: 2026-04-15 > Professional LED gym timer app for iPhone and iPad. 7 timer modes. One-time purchase, no subscription. BoxClock turns your iPhone or iPad into a professional gym clock with large LED digits visible from across the room. It replicates the experience of wall-mounted LED gym timers in a mobile app. Built for athletes, coaches, and gym owners who need a reliable, visible timer without dedicated hardware. ## Developer Built by Tiny Delights. ## Pricing Clock, Stopwatch, and Countdown are free. Premium ($4.99 one-time) unlocks EMOM, AMRAP, Tabata, Custom Intervals, and Bookmark Workouts. No subscription. Pay once, train forever. Purchase restores across devices via Apple ID. ## Timer Modes — Detailed ### Clock (Free) Displays current time in large LED digits. Supports 12-hour and 24-hour format. Screen stays on indefinitely, making it a replacement for wall-mounted gym clocks. Zero configuration — open the app, select Clock, done. Works on both iPhone and iPad. Ideal for home gyms, garage gyms, and small training spaces that do not justify dedicated wall clock hardware. ### Stopwatch (Free) Simple count-up timer from zero. Start, stop, and reset controls. Large LED digits fill the screen for maximum visibility. High contrast red digits on black background. Screen stays on for the entire duration. Landscape orientation maximizes digit size. Used for time-trial workouts, rest timing between heavy sets, and group training where a visible clock keeps everyone accountable. ### Countdown (Free) Counts down from any configured duration to zero. Large LED display counts down in real time. Audio alert fires when the countdown reaches zero. 10-second pre-countdown lets athletes get in position before the work begins. Screen stays on for the full duration. Simple one-tap start from the setup screen. Used for timed sets, rest periods, conditioning blocks, stretching holds, and class segment management. ### EMOM — Every Minute on the Minute (Premium) EMOM assigns exercises to be completed within a one-minute window. Whatever time remains before the next minute is rest. BoxClock's EMOM mode lets you set the number of rounds and time per round. Features a large LED countdown display, green round counter for current round tracking, and audio cue at every minute mark. 10-second pre-countdown before round one. Screen stays on. Bookmark favorite EMOM configs for quick access. Common EMOM formats: single-movement (10 kettlebell swings every minute for 10 minutes), alternating (different movements on odd/even minutes), and long endurance EMOMs (20-30 minutes with movement rotations). ### AMRAP — As Many Rounds as Possible (Premium) AMRAP sets a fixed time cap. Athletes complete as many rounds of a prescribed circuit as possible before time runs out. The score is total rounds plus additional reps. BoxClock's AMRAP mode features a large LED countdown showing time remaining, a swipe-up round counter, and an audio signal when time is up. 10-second pre-countdown. Bookmark go-to AMRAP benchmarks. AMRAP workouts test work capacity under time pressure. Used in competitive functional fitness, military training, and general conditioning. Also an effective diagnostic tool for tracking fitness progress over training cycles. ### Tabata — Work/Rest Intervals (Premium) Tabata is a high-intensity interval protocol originally prescribing 20 seconds max effort / 10 seconds rest for 8 rounds (4 minutes total). Developed by Dr. Izumi Tabata, tested on Olympic speed skaters. BoxClock's Tabata mode is fully configurable — not locked to 20/10. Set work time, rest time, and rounds. Features distinct color indicators for work and rest phases, audio cues on every transition, and a round counter. 10-second pre-countdown. Bookmark preferred configs. Common Tabata variations: 20/10 (classic), 30/15 (bodyweight), 40/20 (loaded exercises). Used for warmups, finishers, standalone conditioning, and group training with any movement. ### Custom Intervals (Premium) The most flexible timer mode. Configure five independent variables: sets, rounds, work time, rest time, and set rest. Nested structure — sets wrap rounds of work + rest, with longer set rest between blocks. Example: 4 sets of 5 rounds (30 seconds work / 15 seconds rest) with 2 minutes set rest between blocks. This structure is essential for strength circuits, density blocks, sport-specific conditioning, and complex competition prep workouts that simpler timers cannot express. Features distinct color indicators for work, rest, and set rest phases. Audio cues on every phase transition. Set and round counters track position in the session. 10-second pre-countdown. Bookmark complex configs for reuse. ## Live Activities (New in v1.1) BoxClock supports iOS Live Activities. When a timer is running, it stays visible on your iPhone lock screen with countdown, round count, and workout phase displayed. Pause and resume controls work directly from the lock screen. No need to unlock your phone during a workout. Works with all timer modes. Especially useful for athletes who lock their phone during training but need to glance at the timer between movements. ## Key Features - Large LED display with red digits for time, green for rounds, amber for rest — readable from across the gym - Live Activities: timer stays visible on iPhone lock screen (v1.1+) - Audio cues on all transitions, loud enough for gym environments - 10-second pre-countdown before workouts begin - Screen stays on during workouts — no auto-lock interruptions - Each mode remembers its settings between sessions - Bookmark up to 10 workout configurations for quick access - Works on iPhone and iPad (universal app) - Landscape orientation for maximum digit size - Respects device silent mode with optional override in Settings - Restore purchases across devices via Apple ID ## iPad as a Gym Timer BoxClock works on any iPad, making it an effective replacement for dedicated LED gym timer hardware. A used iPad ($150-200) plus a wall mount ($20-30) replaces a dedicated LED gym clock that costs $200-500. Unlike hardware clocks that only show time, an iPad running BoxClock can switch between all 7 timer modes. Setup takes 5 minutes: download BoxClock, select a mode, mount the iPad, plug in a power cable. The screen stays on indefinitely. In landscape on a standard iPad, the LED digits are approximately 4 inches tall — visible from 20+ feet. Enable Guided Access in iOS Settings to lock the iPad to BoxClock in shared gym environments. Any iPad that runs the current version of iOS works — an older iPad collecting dust is a perfect candidate. ## Home Gym Use Case BoxClock is particularly useful for home and garage gym training where there is no coach calling time. The timer provides structure, pacing, and accountability for solo athletes. Sample home gym week: Monday — EMOM Strength (10-minute EMOM, 3 front squats every 90 seconds). Wednesday — Tabata Conditioning (3 Tabata blocks with kettlebell swings, burpees, rowing). Friday — AMRAP Benchmark (15-minute AMRAP, 5 pull-ups / 10 push-ups / 15 air squats, record score). ## EMOM vs Tabata vs AMRAP The three most popular gym timer formats serve different purposes. EMOM: fixed rounds, work within each minute, rest is whatever time remains. Best for pacing discipline, skill work, and strength volume (10-30 minutes). Tabata: fixed work/rest intervals, traditionally 20s on / 10s off. Best for short max-intensity conditioning (4-8 minutes per block). AMRAP: continuous work against a countdown, score is total rounds + reps. Best for work capacity testing and benchmarking (8-20 minutes). How to choose: pacing discipline = EMOM, short max intensity = Tabata, total output testing = AMRAP, full control over structure = Custom Intervals. ## Frequently Asked Questions ### Is BoxClock free? Clock, Stopwatch, and Countdown are free. EMOM, AMRAP, Tabata, Custom Intervals, and Bookmark Workouts are available with a one-time premium upgrade for $4.99. No subscription. ### Does it work on iPad? Yes. BoxClock is a universal app that runs natively on both iPhone and iPad. ### Can I use it without sound? Yes. BoxClock respects your device's silent mode. You can also override silent mode in Settings if you want audio cues even when your phone is silenced. ### How do I save workouts? Tap the bookmark icon on the setup screen to save your current configuration. You can save up to 10 workouts for quick access. ### How do I restore my purchase? Open BoxClock, go to Settings, and tap Restore Purchases. Your premium upgrade is tied to your Apple ID and can be restored on any device. ### Will there be an Apple Watch app? Not at this time. BoxClock is designed to replace wall-mounted gym clocks, so a large screen is core to the experience. ## Privacy BoxClock collects no personal data. No analytics, no tracking, no advertising, no user accounts. No third-party SDKs collect data. Timer configurations and bookmarked workouts are stored locally on your device and never transmitted. In-app purchases are processed by Apple via StoreKit. Tiny Delights does not receive, process, or store any payment details or Apple ID data. The app is safe for use by all ages. ## Links ### Product - Homepage: https://boxclock.app - App Store: https://apps.apple.com/app/boxclock-gym-timer/id6761938669 - Privacy Policy: https://boxclock.app/privacy - Support: https://boxclock.app/support - About: https://boxclock.app/about ### Timer Modes - EMOM Timer: https://boxclock.app/emom-timer - Tabata Timer: https://boxclock.app/tabata-timer - AMRAP Timer: https://boxclock.app/amrap-timer - Countdown Timer: https://boxclock.app/countdown-timer - Stopwatch: https://boxclock.app/stopwatch - Interval Timer: https://boxclock.app/interval-timer - Gym Clock: https://boxclock.app/gym-clock ### Guides - EMOM vs Tabata vs AMRAP: https://boxclock.app/emom-vs-tabata-vs-amrap - Best Gym Timer App: https://boxclock.app/best-gym-timer-app - How to Use a Workout Timer: https://boxclock.app/how-to-use-workout-timer - iPad Gym Timer: https://boxclock.app/ipad-gym-timer - Home Gym Timer: https://boxclock.app/home-gym-timer ## Contact support@boxclock.app