Best Overall Interval Timer
Gymboss Interval Timer
Key details
- Mounting
- Clip-on
- Alert System
- Chime and vibration
- Display Size
- Small LCD, no backlight
- Power Source
- 1 AAA battery
The Gymboss pairs two programmable intervals with up to 99 repeats, so a Tabata or run/walk block runs itself once you press start. It clips to a waistband, runs on a single AAA battery, and offers both a chime and a vibration alert for the end of each interval. Alert length is adjustable from 1 to 9 seconds, which is enough to signal a break without dragging into the next set.
The vibration alert is strong enough to feel through light clothing, which matters when you are mid-burpee or mid-stride and don't want to watch a clock. The control sequence takes a couple of practice runs: the left switch and right switch share programming duty, and after one or two sessions the order sticks. The interval range covers 2 seconds to 99 minutes, so it handles everything from quick sprints to long slow runs.
This is for budget-conscious solo athletes who train in intervals—HIIT, Tabata, boxing rounds, run/walk splits—and want a dedicated timer they can carry without a phone. A wall-mounted unit is the better fit if the display needs to be visible across a room or the beep has to cover loud group classes. Durability can vary between units, so treat it as a cost-effective personal timer; the feature set still outweighs that risk at this price. It is a practical option for athletes who switch between gym sessions, outdoor runs, and home workouts.
It can also run as a plain stopwatch, which extends its usefulness to warm-ups, stretches, and any workout length that doesn't fit the interval presets.
💡 Pack a spare AAA in your gym bag; the timer runs on one AAA, so swapping in a fresh battery takes seconds.
Pros
- Dual-interval programming with up to 99 repeats keeps HIIT, Tabata, and run/walk sessions on pace.
- Vibration alert is strong enough to feel mid-exercise, so you don't have to keep watching the timer.
- Compact clip-on body runs on one AAA battery, easy to carry between home, gym, and outdoor routes.
- Programming order becomes automatic after a couple of practice sessions, making daily interval changes quick.
Cons
- Compact LCD digits and no backlight limit reading distance in dim rooms.
- The chime can be lost under loud music or headphones, so vibration is the clearer cue in noisy settings.
For one athlete who wants a portable interval timer with real programmability at a budget price, this is the version to get.