Comparison

Subintervals vs Calorie Gap

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

Calorie Gap

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Is your daily calorie burn sometimes hundreds lower than usual? If you charge your Apple Watch overnight, the resting calories for those hours can go missing from Apple Health. Calorie Gap finds the missing hours and fills them in using your own burn rate. Once those hours are filled in, calorie trackers like Lose It! and any other app that reads Apple Health see your full daily burn, and your calorie budget is right again. HOW IT WORKS Calorie Gap scans your Resting Energy history for hours with no data. For each gap, it estimates an hourly burn rate from your own data: gaps while you slept use your lowest overnight rate, and gaps while you were awake use the rate from just before the gap. Review the correction and adjust it if needed, or let the app fix new gaps automatically in the background. KEY FEATURES • Automatic gap detection and background monitoring • Smart Fix — separate burn rates for sleep and waking hours • One-tap or fully automatic gap fixes • Detailed hourly timeline for each gap • Notifications when new gaps appear • Choose how far back to scan, from 1 to 30 days • Mark a gap as resolved if you already logged those calories yourself • Every fix can be undone, and your existing Health data is never changed PRIVACY All processing happens on your iPhone. Your health data is never sent to a server. WHAT'S INCLUDED Try all features free for 14 days, then unlock permanently with a single purchase — no subscriptions. Calorie Gap requires access to Resting Energy data in Apple Health.

Screenshots

Subintervals4 screens
Calorie Gap4 screens

Verdict

The call

The clearest difference is iOS requirement: Subintervals at 16.4 against Calorie Gap's 18.0. On price, update cadence, ads and in-app purchases 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 and Calorie Gap sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Subintervals ships an update weekly, Calorie Gap every 2 weeks. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Subintervals versus Calorie Gap: the parameters behind the verdict, then further details
ParameterSubintervalsCalorie Gap
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.4 — better18.0
Further details — not scored
Size109 MB6 MB
Age rating4+4+
DeveloperInaki Arroyo NebredaDIANA SMIRNOVA

In-app purchases

4 purchases

Subintervals

One-time4
  • Coffee$3.99
  • Lunch$11.99
  • Big Thanks$17.99
Show 1 more
  • Sponsor$44.99
2 purchases

Calorie Gap

One-time2
  • Calorie Gap TrialFree
  • Calorie Gap Premium$4.99

Questions

Is Subintervals free?
Subintervals is free to download, with in-app purchases available.
Is Calorie Gap free?
Calorie Gap is free to download, with in-app purchases available.
Do Subintervals or Calorie Gap have ads?
Neither Subintervals nor Calorie Gap shows ads.
Which is updated more often, Subintervals or Calorie Gap?
Subintervals ships an update weekly, and Calorie Gap every 2 weeks. Most recently, Subintervals was updated on November 4, 2026 and Calorie Gap on October 25, 2026.

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