A ten-year veteran for tracking fuel and service work, functional and free, but the iOS app lags well behind Android in features and has not been updated in over a year.
評価点：Simple fillup and service entry, cross-device sync, free core, large vehicle database, compare fuel economy with other users
不満点：iOS version has fewer stats and charts than Android, no updates in over a year, periodically logs you out, stations disappear from the database, cannot insert a missed fillup without a cascading recalculation
向いている人：Budget-conscious drivers who want to track fuel economy and service history without spending money
One of the best fuel and expense trackers on iOS: has been around since 2009, a responsive developer who answers email directly, no ads, no subscriptions. Downsides are data getting cut off past 3 years and iOS-only.
評価点：A living developer who replies fast, no ads or subscriptions, detailed expense and mileage analytics, proven across 10+ years of real use
不満点：Data silently truncates beyond 3 years, iPad version costs extra, cross-iPhone sync broke after an update, motorcycle support is incomplete
向いている人：Drivers who want an honest expense and MPG history without ads or monthly fees
The only widely available ethanol-free gas station finder in the US, useful for classics and motorcycles, but the database goes stale and the developer is nearly unreachable.
評価点：Finds ethanol-free gas where you cannot find it otherwise, simple to use, volunteer project with no monetization
不満点：Map listings do not stay current and some stations have closed, no octane rating filter, search is limited to a 30-40 mile radius, data entry is broken after an update (cannot enter decimals)
向いている人：Owners of classic cars, motorcycles, and aircraft who need gas without ethanol
A mature multi-vehicle expense and fuel tracker with service interval tracking, but the monetization model changed and users now hit record limits or lose access to old data.
評価点：Works reliably over 4-8 years, accurate real fuel consumption vs. car display, combined time-and-mileage service reminders
不満点：Record limit blocks without warning, Pro version migration breaks, data export requires a separate purchase, EV import does not work
向いている人：Owners of multiple vehicles who care about years of expense history and service intervals
