IMSA vs GridRival
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IMSA
Stay updated with every IMSA race weekend. Access live video, IMSA Radio, and real-time timing and scoring for the WeatherTech SportsCar Championship and Michelin Pilot Challenge series.
- Live video streaming
- IMSA Radio access
- Live timing and scoring
- Race weekend coverage
- WeatherTech SportsCar Championship
- Michelin Pilot Challenge
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The official IMSA mobile app features live video, IMSA Radio, timing and scoring and more during every IMSA WeatherTech SportsCar Championship and IMSA Michelin Pilot Challenge race weekend.
GridRival
Engage in fantasy sports for motorsports like INDYCAR, F1, NASCAR, and MotoGP. Compete in season-long leagues or daily 'Picks' contests for a chance to win prizes. Analyze data and connect with friends to dominate your fantasy leagues.
- Fantasy games for INDYCAR, F1, NASCAR, MotoGP
- Daily 'Picks' contests with prize potential
- Season-long fantasy leagues
- In-app data and stats tools
- Private league creation and chat
- Social features for connecting with friends
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OFFICIAL FANTASY SPORTS APP OF INDYCAR! GridRival is proud to be the official fantasy sports partner of INDYCAR, bringing you closer to every INDYCAR race! Compete in fantasy games for the most iconic races in American motorsport. GridRival offers the most engaging fantasy motorsports experience, bringing you the excitement of INDYCAR, Formula 1 and NASCAR. Join season-long fantasy leagues and compete with friends all season. DOMINATE YOUR FANTASY LEAGUES - Create private leagues and invite friends to join the action. - Analyze drivers and teams with our in-app data tools. - Stay connected with your league using built-in chat for banter, tips, and celebrations. TOOLS TO ANALYZE AND WIN Dive into detailed stats, compare drivers, and analyze team performance to create the perfect lineup. Our tools give you the edge you need to win. SOCIAL CONNECTIONS BUILT-IN Motorsport is better with friends. GridRival’s social features make connecting, sharing insights, and celebrating wins with like-minded rev heads easy. BUILT FOR RACE FANS, BY RACE FANS GridRival isn’t just another app—it’s the ultimate platform created for motorsport enthusiasts like you. DOWNLOAD GRIDRIVAL TODAY Don’t just watch the race—become part of it. GridRival is the ultimate fantasy platform for motorsport fans. Whether you’re into INDYCAR, NASCAR, Formula 1, or other racing series, GridRival brings the excitement of the track straight to your phone. Join the community of motorsport enthusiasts already dominating the competition. Download GridRival now and start playing today! GridRival is unofficial and is not associated with Formula One companies. F1, FORMULA ONE, FORMULA 1, FIA FORMULA ONE WORLD CHAMPIONSHIP, GRAND PRIX, and related marks are trademarks of Formula One Licensing B.V. GridRival does not have any official relationship or partnership with Formula One companies, any specific Formula 1 team, or any Formula 1 driver. Any references to Formula One, F1, FORMULA ONE, FORMULA 1, FIA FORMULA ONE WORLD CHAMPIONSHIP, GRAND PRIX, or related marks are made solely for editorial and informational purposes and do not imply any endorsement, sponsorship, or affiliation by Formula One companies, any specific Formula 1 team, or any Formula 1 driver.
Screenshots
Verdict
The clearest difference is review sentiment: GridRival at 83% against IMSA's 28%. GridRival also leads on rating (4.7 vs 4.1) and ads (none vs shown). IMSA's advantage is monetization model (ad-supported vs free with in-app purchases). On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
GridRival holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: GridRival has 2.6K ratings behind it against 70, so its average is the more settled of the two. Written reviews point the same way: 28% of IMSA's written reviews are positive against 83% of GridRival's.
IMSA ships an update every 2 months, GridRival every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | IMSA | GridRival |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (70 ratings) | 4.7 (2.6K ratings) — better |
| Positive reviews | 28.3% of reviews | 83.0% of reviews — better |
| Number of ratings | 70 | 2.6K — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 93 MB | 97 MB |
| Age rating | 12+ | 12+ |
| Developer | International Motor Sports Association, LLC | Whitespectre SLU |
Customer experience
IMSA
GridRival
User reviews
IMSA
From 70 App Store ratingsWhat we love
- 👍 Brilliant app
- 👍 Great app
- 👍 Very informative
- 👍 Awesome app!
- 👍 Suburb
Room to improve
- 🐛 This app would be amazing if you could actually watch the race on the live stream
- 🐛 Won't let me delete account
- 🐛 Timing and scoring terrible
- 🐛 Live scoring needs improvement
- 🐛 It's so broken
GridRival
From 2.6K App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Engaging fantasy experience
- 💡 Unique contract system
- 🚀 Quick scoring updates
- 👍 Helpful customer support
Room to improve
- 🐛 Frequent crashes and bugs
- 🐛 Inconsistent notifications
- 🐛 Scoring issues and inaccuracies
- 🐛 Unreliable login and account management
- 🐛 Slow performance during peak times
Bugs and requests
IMSA
Reported bugs
8 issues- No portrait mode
- Hamburger menu issues
- Incompatible with newer devices
- Outdated information
- Crashes when opened
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- Login issues
- Slow performance
- Video playback issues
Requested features
5 requests- Apple TV app
- Notifications
- Landscape mode
- Live feed
- Live timing and scoring
GridRival
Reported bugs
4 issues- App crashes on launch
- Logout issues and inability to log back in
- Incorrect scoring and points allocation
- Glitches with driver contract system
Requested features
5 requests- Ability to set lineups automatically
- More motorsport series support (IndyCar, NASCAR, etc.)
- Improved league management tools
- Historical performance tracking
- Expanded betting/DFS options
In-app purchases
IMSA
No in-app purchases
GridRival
No in-app purchases
