One Car Challenge
Carma Travel iPhoneiPadiPod touch
One Car Challenge is a free Travel app for iPhone and iPad by Carma. Rated 2.8/5 from 9 ratings. Requires iOS 17.6. Updated October 7, 2026.
- Rating
- 2.8
- 9 ratings
- Price
- Free
- on the App Store
- Size
- 114 MB
- Age 4+
- Updated
- Oct 7
- 2026 · v1.0.4
Screenshots
About One Car Challenge
The One Car Challenge is an 11-week pilot from LA Metro. If your household leaves one enrolled vehicle parked for the week — under 3 miles driven — you earn $120 for that week. EVERY PARTICIPANT COMPLETES THREE STAGES · Baseline (1 week) — no earnings. A starting-point reading so LA Metro can measure your normal driving. · Earning (5 weeks) — keeping one enrolled vehicle under 3 miles for the week earns you $120 for that week. · Research (5 weeks) — no earnings, drive as usual. Your weekly readings help LA Metro measure the pilot. Households enter the earning and research stages in a set order — some earn first and help with research in the second half; others do the reverse. Your order is set at enrolment. HOW THE APP WORKS · Each Sunday during the pilot, you submit an odometer reading for every enrolled vehicle. If your car supports it, One Car Challenge reads the odometer automatically through a supported connection. Otherwise, snap a weekly photo. · Weekly surveys are part of the pilot and carry small extra rewards. THREE REQUIRED READINGS The pilot needs an odometer reading from you in three specific weeks: · Baseline week: odometer due on 4 Oct 2026 · Crossover week: odometer due on 8 Nov 2026 · Final week: odometer due on 13 Dec 2026 Miss any one and you're removed from the pilot — this is a core part of how LA Metro measures the results. HOW YOU GET PAID Choose between a one-time virtual Visa card delivered by email, or a payout to your existing debit card. All earnings are paid together after the pilot ends in December, once LA Metro reviews the final results. ENROLMENT The One Car Challenge is invitation-only. If you were invited by LA Metro, your email address will match the invitation list at sign-up. Participants must live in LA County. Enrolment closes at 3,000 households. SUPPORT Tap Contact Us in the app any weekday during business hours. Our team responds through the in-app chat. Powered by GoCarma. The One Car Challenge is a research pilot sponsored by LA Metro, in partnership with King's College London, the Center for Advanced Hindsight at Duke, the Southern California Association of Governments, and the California Air Resources Board.
Ratings & reviews
2.8
9 ratings
What’s new
Version 1.0.4 · Updated October 7, 2026
Welcome to the One Car Challenge. An 11-week research pilot from LA Metro. Keep one household vehicle under 3 miles a week during earning weeks and earn $120 that week. · One Sunday odometer reading per vehicle — snap a photo or connect Auto-Submit · Baseline → Earning → Research (or Baseline → Research → Earning, depending on your cohort) · Track your running balance and every reading on the home screen · Contact Us in the app for support, weekdays during business hours Powered by GoCarma.
App privacy
The developer, Carma, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Contact Info: Other User Contact Info, Physical Address, Email Address, Name, Phone Number
- Usage Data: Product Interaction
- User Content: Customer Support
- Identifiers: User ID
- Diagnostics: Crash Data
Used for: Analytics, App Functionality
Alternatives to One Car Challenge
Looking for apps like One Car Challenge? Here are 6 similar apps on the App Store. The highest rated is Modemix – Bike & Train (5.0/5), and all 6 are free to download.
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LA Metro - Official
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LAnow
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| One Car Challenge | 2.8 / 5 (9 ratings) | Free | October 7, 2026 | |
| Modemix – Bike & Train | 5.0 / 5 (27) | Free | Oct 9, 2026 | Compare |
| LA Metro - Official | 4.6 / 5 (1,053) | Free | Jun 25, 2026 | Compare |
| LAnow | 4.7 / 5 (241) | Free | Oct 6, 2026 | Compare |
| LA Metro Parking | 4.8 / 5 (1,015) | Free | Aug 18, 2025 | Compare |
| Transit Watch for LA Metro | 4.5 / 5 (994) | Free | Jun 16, 2026 | Compare |
| Throne Bathroom Network | 4.1 / 5 (48) | Free | Sep 15, 2026 | Compare |
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