Comparison

CalcuSplit vs GridRunGP

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

Head to head
About

CalcuSplit

Easily time multiple runners simultaneously for races, relays, or interval workouts. Save and load presets for quick setup, track lap splits, and toggle rest periods. Export results in various formats or text them directly to participants.

Highlights
  • Time multiple runners at once
  • Track lap splits and finish times
  • Save and load event presets
  • Real-time handoff tracking for relays
  • Toggle rest periods for interval training
  • Export results as PDF, CSV, or HTML
  • Text results directly to runners
Features
Read full description

CalcuSplit is designed to be a runner's best tool at the track. Whether you are a high school coach, friends holding an informal 5K, or just trying to help your running buddies reach their next PR, CalcuSplit makes it easy to time laps for multiple runners. One coach, one device, a whole heat. Every runner gets their own row with their own Lap and Finish buttons, so nothing gets written on a clipboard and nothing gets reconstructed afterwards. --- It couldn't be easier! - Add and track multiple runners - Time races, relays, and interval workouts - Hand off between legs in a relay and see each leg's time on its own line - Select participants for an event and start tracking - Get your results, including lap and finish times - Text each runner their own result when the race is done - The screen stays on while timing, so you don't have to worry about the device locking during a race - On iPad, runners fill the width in two or three columns, so a full heat fits without scrolling CalcuSplit Premium unlocks - View each runner's race/lap history and track their progress across the season - View past events and export the results as PDF, HTML, or CSV for easy sharing - Bulk import runners from a spreadsheet or CSV file --- All data is securely stored on your iPhone. No ads, tracking, or external servers. That also means that CalcuSplit will work anywhere, even in areas with no cell service! If your systems administrator has any questions, please have them contact me at CalcuApps@iannaz.zone.

About

GridRunGP

Transform your runs into a motorsport experience by racing on real Grand Prix circuits. Track your progress lap by lap with live telemetry and compete in team-based challenges. All paces are welcome, whether you're running or walking.

Highlights
  • GPS run tracking
  • Lap-by-lap timing with sector splits
  • Live animated circuit visualization
  • Fastest lap and personal best tracking
  • Team-based competition
  • Strava integration
  • Offline functionality
Read full description

GridRunGP transforms your runs into a motorsport experience. Run on real Grand Prix circuits, compete with teams, and see your performance broken down into laps and sector times, just like the pros. Whether you're a runner, walker, or just a motorsport fan, GridRunGP welcomes you to the grid. HOW IT WORKS Pick a Grand Prix circuit like Bahrain, Barcelona, Albert Park, Las Vegas, Yas Marina, or Lusail. Start running anywhere and GridRunGP maps your distance to the circuit layout, tracking your progress lap by lap with live telemetry. FEATURES - GPS run tracking with background location support - Lap-by-lap timing with sector splits (S1, S2, S3) - Live animated circuit visualization showing your position - Fastest lap and personal best tracking - Grand Prix race week events with team-based competition - Team championship standings with motorsport-style points - Activity verification system to keep competition fair and honest - Strava integration to sync your existing runs - Works offline. Runs save locally and sync when connected RACE WEEK COMPETITION During Grand Prix race weekends, join a team and compete. Your real runs count toward team standings and championship points. See how your pace stacks up on the timing tower alongside other runners. The team with the most distance earns top points, and the fastest verified lap earns a bonus. ALL PACES WELCOME Both running and walking count. All paces are valid: fast, slow, or anywhere in between. GridRunGP is an inclusive fitness challenge, not a cutthroat competition. Stay active, race clean, and enjoy the grid. Free to use. No ads. No subscription.

Screenshots

CalcuSplit4 screens
GridRunGP4 screens

Verdict

The call

The clearest difference is in-app purchases: GridRunGP at none against CalcuSplit's 1. GridRunGP also leads on rating (5.0 vs 4.7) and update cadence (every 6 days vs every 3 weeks). CalcuSplit's advantage is ratings volume (21 vs 2). On price, 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. CalcuSplit sells 1 one-off in-app purchase. GridRunGP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GridRunGP holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CalcuSplit has 21 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

CalcuSplit ships an update every 3 weeks, GridRunGP every 6 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
CalcuSplit versus GridRunGP: the parameters behind the verdict, then further details
ParameterCalcuSplitGridRunGP
PriceFreeFree
Rating4.7 (21 ratings)5.0 (2 ratings) — better
Positive reviews75.0% of reviews—
Number of ratings21 — better2
Update frequencyEvery 3 weeksEvery 6 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size3 MB48 MB
Age rating4+17+
DeveloperJoseph IannazzoneJoseph Ryan

Customer experience

CalcuSplit

All ratings21 ratings
Positive90.5%
Neutral9.5%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

GridRunGP

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

CalcuSplit

One-time1
  • CalcuSplit Premium$4.99
None

GridRunGP

No in-app purchases

Questions

Is CalcuSplit free?
CalcuSplit is free to download, with in-app purchases available.
Is GridRunGP free?
GridRunGP is free to download, with no in-app purchases.
Which has better reviews, CalcuSplit or GridRunGP?
GridRunGP is rated higher. CalcuSplit averages 4.7 out of 5 from 21 ratings, while GridRunGP averages 5.0 from 2 ratings.
Do CalcuSplit or GridRunGP have ads?
Neither CalcuSplit nor GridRunGP shows ads.
Which is updated more often, CalcuSplit or GridRunGP?
CalcuSplit ships an update every 3 weeks, and GridRunGP every 6 days. Most recently, CalcuSplit was updated on November 7, 2026 and GridRunGP on November 5, 2026.

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