Comparison

HIIT | Down Dog vs One Second Run

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HIIT | Down Dog

This app offers dynamic, personalized HIIT workouts with over 1000 exercises to prevent plateaus. Customize workout length, intervals, and focus areas, with options to exclude specific movements. Enjoy motivating music and coach voices, with seamless syncing across devices.

Highlights
  • Over 1000 unique exercises
  • Customizable workout length and intervals
  • Selectable exercise focus areas
  • Exclude unwanted exercises
  • Dynamic music matching workout pace
  • Choice of coach voices
  • Syncs across devices
Features
Read full description

With pre-recorded videos, you get bored, and so do your muscles! Avoid the dreaded workout plateau and get ripped with HIIT. With over 1000+ different exercises, you’ll never get the same workout twice! BEGINNER FRIENDLY If you’re brand new to HIIT, Level 0 is the perfect place to start! Use your own body weight to get your heart rate up and efficiently burn fat while building muscle - no fancy props required. Our high definition videos and clear instructions guide you through each HIIT exercise. It’s like having your own personal trainer! BUILD THE WORKOUT YOU WANT Set the total length of your workout Tailor the length of your Exercise Length and Recovery intervals Choose from 4 different levels of Upper Body, Lower Body, and Core to get exercises that challenge you MIX FEATURE Choose from presets like Leg Day, Cardio Killer, Total Body - No Jumps, or our favorite, Bringing Sexy Back, or create your own mix of aerobic, core, glutes, legs and upper body Exclude exercises that don’t work for you: Sore wrists? Say goodbye to table tops and planks. Tired of burpees? No problem, you’ll never have to hop back again. DYNAMIC CHANGING MUSIC Pick the type of music that gets you hyped, and we supply beats that match your movement and help you push hard to the last second of each interval. CHOOSE YOUR VOICE Select your favorite coach to keep you motivated as you sweat. SYNC BETWEEN DEVICES Automatically syncs across all your devices. Integrates with the Apple Health app! Down Dog's terms and conditions can be found at https://www.downdogapp.com/terms Down Dog's privacy policy can be found at https://www.downdogapp.com/privacy

About

One Second Run

Features
Read full description

One Second Run helps you build a running or walking habit with a simple timer that grows by one second each day. Start with a comfortable first goal, complete today's timer, and tomorrow's target becomes just one second longer. The app keeps the experience light: no GPS, no pace charts, no account, and no pressure. Features: - Daily run or walk timer - One-second daily increase - Onboarding to choose your first start time - Streak and history view - Optional notes for each session - Local reminders - Live Activity and Dynamic Island timer display - Settings to reset progress or choose a new start time One Second Run is designed for consistency. Open the app, start today's timer, finish, and keep the line moving.

Screenshots

HIIT | Down Dog4 screens
One Second Run4 screens

Verdict

The call

The clearest difference is ads: HIIT | Down Dog at none against One Second Run's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HIIT | Down Dog sells 5 in-app purchases, starting at $12.99 per month and One Second Run sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

HIIT | Down Dog ships an update every 10 days, One Second Run every 5 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
HIIT | Down Dog versus One Second Run: the parameters behind the verdict, then further details
ParameterHIIT | Down DogOne Second Run
PriceFreeFree
Rating4.9 (48K ratings) — better—
Positive reviews89.1% of reviews—
Number of ratings48K — better—
Update frequencyEvery 10 daysEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size101 MB64 MB
Age rating4+4+
DeveloperYoga Buddhi Co.SEONGHOON JEON

Bugs and requests

HIIT | Down Dog

Reported bugs

3 issues
  • App freezing and crashing
  • Connectivity problems
  • Inconsistent workout experiences

Requested features

6 requests
  • Preview of upcoming exercises
  • Warm-up and cool-down options
  • Ability to exclude certain exercises
  • More detailed exercise instructions and form cues
  • Offline workout downloads
Show 1 more
  • Integration with fitness tracking devices

One Second Run

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

HIIT | Down Dog

Subscriptions5
  • HIIT Subscription$12.991 Month
  • All Access Subscription2 variants$12.991 Month
  • HIIT Subscription$99.991 Year
Show 2 more
  • All Access Subscription3 variants$99.991 Year
  • All Access Subscription$119.991 Year
1 purchases

One Second Run

One-time1
  • Remove ads$0.99

Questions

Is HIIT | Down Dog free?
HIIT | Down Dog is free to download, with in-app purchases available.
Is One Second Run free?
One Second Run is free to download, with in-app purchases available.
Do HIIT | Down Dog or One Second Run have ads?
One Second Run shows ads; HIIT | Down Dog does not.
Which is updated more often, HIIT | Down Dog or One Second Run?
HIIT | Down Dog ships an update every 10 days, and One Second Run every 5 days. Most recently, HIIT | Down Dog was updated on November 8, 2026 and One Second Run on October 31, 2026.

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