Comparison

V.O2 vs Runtools Calc

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

Head to head
About

V.O2

This app provides adaptive training plans and personalized coaching for runners of all levels. It assesses your fitness, offers custom paces, and syncs with popular devices. Train intelligently to achieve measurable improvements and become your best runner.

Highlights
  • Adaptive training plans
  • VDOT fitness assessment
  • Personalized training paces
  • Sync with Apple Health, Coros, Garmin, Strava
  • Real-time guidance on Apple Watch, Coros, Garmin
  • Training adaptation based on improvement
  • Coach communication and training adjustments
Features
Read full description

Coaching app for athletes looking to take their running to the next level. How it works Athletes: Get an invite from a coach or choose one coaching option. • Adaptive Trainer (14-Day Free Trial) • Goal Race Plan • Match with a Private Coach Coaches: Start your 30-day free trial and learn how to manage your athletes at https://vdoto2.com/vdotcoach Popular Features • Assess your current running fitness (VDOT) • Built-in personalized training paces • Sync training calendar with GPS data from Apple Health, Coros, Garmin or Strava • Sync workouts/pace targets to Apple Watch, Coros or Garmin for real-time guidance • Adapt your training based on your improvement • Work with your coach, communicate and adjust training Truly Personalized Unlike most running apps, VDOT knows you. It understands the type of runner you are, what you're training for, and how to maximize your efforts. It also gives you more control over your training, leveraging your feedback to deliver real-time data which fine tunes your training and leads to continuous progression. With fully automated, truly personalized and highly-adaptive training, VDOT helps you achieve measurable improvement — all in an effort to make you the best runner you can be. Intelligent Training With a focus on training over tracking and coaching over running, VDOT offers access to the highest quality, Olympic-style training for runners of all levels-right from any mobile device. Designed to help runners train correctly and more intelligently, VDOT elicits maximum benefit while reducing the required effort. These high-quality workouts promote healthy, responsible, and beneficial sessions while simultaneously preventing overtraining. Olympic Pedigree V.O2 was built from the foundation of a scientifically-validated training methodology. Based on former Olympian, author, and legendary running coach Jack Daniels’ exercise science principles, the methodology not only benefits runners of all ages and abilities when it comes to improving their running fitness but it also serves as the best measure of running economy across a variety of runners and events, making it an ideal way to compare performances. High-school, college, Olympic and non-elite runners have all trained, ran, and succeeded with the VDOT methodology. -”Dr. Jack Daniels has had a bigger influence on training-for-running than anyone. He might be considered the Albert Einstein of the sport." - Runner’s World Magazine

About

Runtools Calc

This app simplifies running calculations for athletes and coaches. It accurately computes splits, pace, and performance metrics in a clear format, offering VO₂ max calculations and preset race distances. Train smarter with precise data without unnecessary complexity.

Highlights
  • Calculate splits for any distance and total time
  • View pace in multiple units (min/mi, min/km, mph, km/h)
  • Accurate pace formatting
  • Preset distances for common races
  • VO₂ calculator with fitness insight
  • Clean, readable layout for quick reference
Features
Read full description

RunTools Calc is a free training calculator built for runners and coaches who care about accuracy. Most running apps overcomplicate simple math. RunTools Calc focuses on what actually matters: splits, pace, and performance clarity—presented in a clean, readable format. Features • Calculate splits for any distance and total time • View pace in min/mi, min/km, mph, and km/h • Simple vertical split layout designed for quick reference • Accurate pace formatting (no broken times like 3:60) • Preset distances including Mile, 8K, 10 Mile, 15K, Half Marathon, and Marathon • VO₂ calculator with fitness-level insight • Built for athletes, coaches, and serious training Whether you’re planning workouts, checking race pace, or coaching athletes, RunTools Calc gives you the numbers you need—without noise. Train smarter. Run with precision.

Screenshots

V.O24 screens
Runtools Calc4 screens

Verdict

The call

The clearest difference is in-app purchases: Runtools Calc at none against V.O2's 17. Runtools Calc also leads on review sentiment (100% vs 71%). V.O2's advantage is ratings volume (6.3K vs 5) and update cadence (weekly vs fortnightly). On price, rating, ads 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. V.O2 sells 16 in-app purchases, starting at $12.99 per month. Runtools Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for V.O2 against 5.0 for Runtools Calc. That said, the two scores are not equally well evidenced: V.O2 has 6.3K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 71% of V.O2's written reviews are positive against 100% of Runtools Calc's.

UpkeepUpdate frequency

V.O2 ships an update weekly, Runtools Calc fortnightly. The most recent releases landed on October 29, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
V.O2 versus Runtools Calc: the parameters behind the verdict, then further details
ParameterV.O2Runtools Calc
PriceFreeFree
Rating4.9 (6.3K ratings)5.0 (5 ratings) — better
Positive reviews71.0% of reviews100.0% of reviews — better
Number of ratings6.3K — better5
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.615.6 — better
Further details — not scored
Size142 MB1 MB
Age rating4+4+
DeveloperThe Run SMART Project, LLCLadarius tellis

Customer experience

V.O2

All ratings6,278 ratings
Positive97.6%
Neutral0.9%
Negative1.4%
Written reviews176 reviews
Positive71.0%
Neutral8.0%
Negative21.0%

Runtools Calc

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

V.O2

Reported bugs

4 issues
  • Apple Watch app issues and lack of functionality
  • Problems with syncing Garmin runs to the correct workouts
  • Inconsistent elevation and GPS data
  • Bugs and crashes when using the app

Requested features

6 requests
  • Ability to duplicate and edit workouts
  • Improved Apple Watch and Health app integration
  • More advanced adaptive training and automation
  • Expanded cross-training and workout modalities
  • Better user interface and workflow for coaches
Show 1 more
  • Keyword-based search for notes and workouts

Runtools Calc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

16 purchases

V.O2

Subscriptions2
  • Adaptive Training Subscription14 Days trial2 variants$12.991 Month
  • Adaptive Training - Annual14 Days trial$99.991 Year
One-time14
  • Base/Fitness - 8 weeks$44.99
  • Half Marathon - 12 weeks$54.99
  • 10 Km - 12 weeks$54.99
Show 11 more
  • 5 Km - 12 weeks$54.99
  • 1500m - 12 weeks$54.99
  • 3 Km - 12 weeks$54.99
  • Marathon - 15 weeks$69.99
  • Half Marathon - 15 weeks$69.99
  • Marathon - 18 weeks$79.99
  • Half Marathon - 18 weeks$79.99
  • Jack's Elite Marathon - 18wks$79.99
  • Jack's First Marathon - 18wks$79.99
  • Jack's Boston Marathon - 18wks$94.99
  • Marathon - 24 weeks$99.99
None

Runtools Calc

No in-app purchases

Questions

Is V.O2 free?
V.O2 is free to download, with in-app purchases available.
Is Runtools Calc free?
Runtools Calc is free to download, with no in-app purchases.
Which has better reviews, V.O2 or Runtools Calc?
Runtools Calc is rated higher. V.O2 averages 4.9 out of 5 from 6.3K ratings, while Runtools Calc averages 5.0 from 5 ratings.
Do V.O2 or Runtools Calc have ads?
Neither V.O2 nor Runtools Calc shows ads.
Which is updated more often, V.O2 or Runtools Calc?
V.O2 ships an update weekly, and Runtools Calc fortnightly. Most recently, V.O2 was updated on October 29, 2026 and Runtools Calc on October 13, 2026.

Other comparisons