Time.is
World Time Buddy
timeanddate.com
Every Time Zone
24 Time Zones
Chronozone
timee.io
vClock
RepDB
Gym Log Track
RepRaptor
Reps.app
Strive Workout Log
Trainera.fit
Your Move App
Time.is displays exact, official atomic clock time for any time zone (more than 7 million locations) in 51 languages.
RepDB is a one-time-purchase exercise dataset for developers building fitness and workout apps — not a subscription, not a rate-limited API. You download the data once and own it: JSON (and SQLite on the higher tier), WebP images, and full EN/DE/ES translations, with no per-request billing and no dependency on our servers staying up.
A free tier includes 250 exercises with flat-style 512×512 images, attribution-licensed for commercial in-app use. The Starter tier ($199) adds the full catalog in classic white-background style. Standard ($399) adds transparent 1024px images, looping animations, exercise relations (similar/progressions/regressions), workout templates, and embeddings — exclusive to that tier.
Every exercise includes muscle-group highlighting, equipment/muscle icons, MET values, and safety/goal tags. Compared to GIF- or JPG-based competitor APIs, RepDB images are transparent WebP with no watermarks, so they drop into any app UI without a white box around them.
RepDBRepDB's answer:
RepDB is sold as a one-time download, not a metered API — you own the JSON/SQLite data and WebP images outright, with no rate limits, no per-request billing, and no risk of the vendor cutting off access. It's also the only dataset in this space with EN/DE/ES translations, transparent (alpha-channel) images with no watermark, muscle-group highlighting, safety/goal tags, and looping animations on the higher tier.
RepDB's answer:
RepDB grew out of a consumer workout app its creator was building solo. Sourcing exercise images and data meant either paying for a subscription API with usage caps and no caching rights, or producing everything from scratch. The illustrated, multi-language dataset was built for us first, then split out as its own product once it became clear other indie developers had the same problem and preferred to buy the data outright rather than rent it through an API.
RepDB's answer:
Most alternatives are subscription APIs — you pay monthly, you're capped on requests, and ExerciseDB's terms of use explicitly forbid caching or storing the data at all, so every image render is a live paid API call. RepDB is the opposite: pay once, download the files, self-host with zero ongoing dependency. It's also the only option offering true DE/ES localization and transparent images instead of a white box behind every exercise.
RepDB's answer:
Solo developers and small teams building fitness or workout-tracking apps (iOS, Android, web) who need licensed exercise images and structured exercise data, but don't want to build their own media pipeline or depend on a rate-limited third-party API.
Based on our record, Time.is seems to be more popular. It has been mentiond 229 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I experience time drift with devices not connected to NTP like cheap stopwatch/microwave clock/etc, but my all my devices connected to NTP stay synced on their own. For example: - my Windows time settings says: "Last successful time synchronization: 3/7/2024..." (This ~41 hours ago and not manually triggered.) - https://time.is/: "Your clock is 0.4 seconds ahead." I'm a little surprised there is a 0.4 second... - Source: Hacker News / over 2 years ago
It's my first quartz watch and I love it to bits! Made me realize that the accuracy of a quartz movement is no joke. I knew nothing much about watches until I started this hobby back in September, and I've still got lots to learn! But from the little I've learned so far, lots of videos say how accurate quartz is, but I didn't realize how accurate it was until I was cleaning some of my mechanical watches. Seikos, a... Source: over 2 years ago
Hi all! Need advice to buy a new trail bike 140 fr/140 back, under 2500 $. On all I need an XL size as I'm 1.96cm and 97kg. Mostly I will do soft trails and maybe in 1 or 2 years after I will progress some harder ones.Maybe is better to buy a cheap one then upgrade over time.is is really that good the fork on the h10 Fox 34 Float Performance 140 3-Position vs the h30 Marzocchi Bomber Z2 140 ? Source: almost 3 years ago
Was wondering, because I put my mechanical watch and digital correct to the second via time.is , how people years ago had to correct time differences? Source: almost 3 years ago
I just tested it against https://time.is on my cell phone (using wifi calling because network strength is abysmal where I live). I don't have a precise measurement but it was imperceptibly close, within 100ms probably. Certainly close enough to set a clock for non critical purposes. - Source: Hacker News / almost 3 years ago
World Time Buddy - Effortless time conversion and world time.
Gym Log Track - The simple, intuitive app that makes it easy to plan, log and track your workouts, exercises, photos, videos, routines and clients quickly.
timeanddate.com - Free Clock for your website or blog!
RepRaptor - Build, share, and run structured workout programs. Free for lifters. Flat pricing for coaches. No per-client fees.
Every Time Zone - Online tool for keeping up with times around the world.
Reps.app - Reps - Workout Tracker Gym Log