Comparison

Subintervals vs RunningCalc

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

Head to head
About

Subintervals

Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.

Highlights
  • Detailed activity and event visualization
  • Interactive performance graphs
  • Seamless intervals.icu sync
  • Customizable data analysis
  • Actionable training insights
Features
Read full description

Elevate Your Training with Subintervals Subintervals transforms your intervals.icu data into actionable insights. This app brings your training activities, events, and performance metrics to life through detailed displays and interactive graphs. Customise and control your data for a tailored analysis, and seamlessly sync with intervals.icu for up-to-the-minute information. Key Features: - Detailed visualisation of activities and events. - Dynamic, interactive graphs for performance tracking. - Effortless sync with intervals.icu. Please note that it is an independent application developed by an enthusiast keen on providing a complementary tool to the official platform.

About

RunningCalc

This app helps runners calculate and convert running pace, speed, distance, and time. It offers features like pace calculation, pace band generation, and split analysis to aid in workout planning and race preparation.

Highlights
  • Pace, speed, and distance calculation
  • Customizable pace band generator
  • Split analysis for runs
  • Cheat sheet creator for pace/speed conversion
  • Flexible unit support (km, miles, km/h, mph)
  • Light and dark mode
Features
Read full description

RunningCalc lets you convert and calculate running pace, speed, distance and time with a clean and easy to use interface with quick input. Plan workouts, analyze splits, create custom pace bands, and instantly convert between pace, speed, and distance. * Pace Calculator: Instantly convert pace, speed and distance by setting any value. Calculate pace, speed, or time by setting any two values. The intuitive locking system lets you fine-tune your calculations on the fly. * Pace Band Generator: Create personalized, printable pace bands for your races. Set your target distance and time, define split lengths, generate a band and print it to keep you on track. * Cheat Sheet Creator: Build custom pace-to-speed (and vice-versa) conversion charts for quick reference. Ideal for knowing your target treadmill speed. * Split Calculator: Track and analyze every segment of your run. Select specific splits to see their combined stats for targeted analysis. Perfect after treadmill sessions or interval training to get the total distance run or calculate the average pace for intervals. Easy to Use: Clean, intuitive interface designed for quick input, even when you're mid-workout. Customizable: Tailor distance presets for both the Pace Calculator and Pace Band to your common running distances. Flexible Units: Seamlessly work with kilometers, miles, km/h, and mph. Light & Dark Mode: Adapts to your system's appearance for comfortable viewing. No ads, no subscriptions – just powerful features to support your running journey.

Screenshots

Subintervals4 screens
RunningCalc4 screens

Verdict

The call

The clearest difference is in-app purchases: RunningCalc at none against Subintervals's 4. Subintervals's advantage is iOS requirement (15.1 vs 17.6). On price, rating, ratings volume and update cadence 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. Subintervals sells 4 one-off in-app purchases. RunningCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Subintervals against 5.0 for RunningCalc. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Subintervals ships an update weekly, RunningCalc every 5 days. The most recent releases landed on September 10, 2026 and June 11, 2026 respectively.

Scorecard3 real differences · 7 level
Subintervals versus RunningCalc: the parameters behind the verdict, then further details
ParameterSubintervalsRunningCalc
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.6
Further details — not scored
Size95 MB2 MB
Age rating4+4+
DeveloperInaki Arroyo NebredaByung Hyun Martin Larvia

Customer experience

Subintervals

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RunningCalc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Subintervals

One-time4
  • Coffee$3.99
  • Lunch$11.99
  • Big Thanks$17.99
Show 1 more
  • Sponsor$44.99
None

RunningCalc

No in-app purchases

Questions

Is Subintervals free?
Subintervals is free to download, with in-app purchases available.
Is RunningCalc free?
RunningCalc is free to download, with no in-app purchases.
Which has better reviews, Subintervals or RunningCalc?
Subintervals and RunningCalc are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Subintervals or RunningCalc have ads?
Neither Subintervals nor RunningCalc shows ads.
Which is updated more often, Subintervals or RunningCalc?
Subintervals ships an update weekly, and RunningCalc every 5 days. Most recently, Subintervals was updated on September 10, 2026 and RunningCalc on June 11, 2026.

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