CalcuSplit vs GridRunGP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- 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
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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
Verdict
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
Both are free to download. CalcuSplit sells 1 one-off in-app purchase. GridRunGP asks for nothing beyond the download.
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.
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.
| Parameter | CalcuSplit | GridRunGP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (21 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 21 — better | 2 |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 48 MB |
| Age rating | 4+ | 17+ |
| Developer | Joseph Iannazzone | Joseph Ryan |
Customer experience
CalcuSplit
GridRunGP
In-app purchases
CalcuSplit
- CalcuSplit Premium$4.99
GridRunGP
No in-app purchases









