Problem & Interest:

• Multiple Reddit threads ask specifically for an app that tracks brake-pad wear, service intervals, tyre rotations, keeps photos of receipts, etc. (r/CarTrackDays 1ie35sj, r/Autos 1adipez, r/Lexus 1kyg9s2, r/iOS 1cfnuhk). Comments often say spreadsheets are painful and ask for better mobile solutions – clear pain-point.

Keyword demand (via tool):

• “car maintenance app” – 880 searches/mo, difficulty 24 (LOW) ✔️
• “best car maintenance app” – 320/mo, difficulty 24 ✔️
• “car maintenance tracker app” – 170/mo, difficulty 24 ✔️
• “vehicle maintenance tracker app” – 390/mo, difficulty 32 (close) => At least one generic KW >500 SV and KD <30, matching validation rule.

Competitors already ranking / in stores:

• CARFAX Car Care (free, 5M+ installs)
• Simply Auto, Drivvo, aCar/Fuelly, Loggy, MyRide901, AutoSist (fleet + consumer), AutoOptimo, VMT Pro, Auto Maintenance Pro (desktop).
• SERP competitor list shows marketplaces & reviews but only a few dedicated SaaS pages (simplyauto.app, simplyfleet.app) – room for good SEO page.

Monetisation proof:

• Simply Auto sells lifetime licence ~$10 or $1.99/mo subscription.
• Drivvo & MyRide901 run freemium/subscription.
• Au...