Spritmonitor vs WrenchTime: which fuel log app fits you?

What is Spritmonitor?

Spritmonitor is a German website that collects the fuel and electricity consumption of vehicles under real-life conditions, entered by its own users. German Wikipedia dates it to 2001, when Thomas Fischl and Dominik Fisch started it alongside their computer science studies at the University of Passau. It is run today by Fisch und Fischl GmbH, a company founded in 2008 and based in Thyrnau.

Spritmonitor is large for a crowdsourced log. English Wikipedia lists over 1.3 million vehicles from 880,000 users, with more than 56 million fuel-ups covering 28 billion kilometres, figures retrieved from Spritmonitor in August 2026. The site is available in German, English, French and Spanish, and registration is optional.

Spritmonitor's data is also used outside the app. Wikipedia names reports by the ICCT ("From Laboratory To Road") and Transport & Environment that used its data set, and media vehicle tests and Stiftung Warentest's used-car guide that cite it.

Is the Spritmonitor app free?

Yes. The Spritmonitor app on the US App Store is listed as free, contains advertising and offers in-app purchases, including one that removes the ads; no subscription was listed when checked on 29 October 2026.

The Spritmonitor app runs on iPhone, iPad and Apple Watch, according to the same listing, and Wikipedia also lists Android apps. It held an average of 4.7 stars from 41 ratings on the US App Store on 29 October 2026, and is updated almost every month by Fisch und Fischl GmbH.

What is WrenchTime?

WrenchTime is an iPhone app for cars and motorcycles that keeps fuel, EV charging, 59 maintenance procedures and trips that record themselves in one log. With a Bluetooth OBD-II adapter it shows live engine data on the phone and on CarPlay. It runs on iOS 26 or later, with iPad and Apple Watch apps, and is available in 13 languages.

I build WrenchTime, so read this comparison knowing that. I did not test Spritmonitor, Fuelio, Drivvo or Fuelly: every claim about them on this page comes from their App Store listings, Drivvo's FAQ and Wikipedia, checked on 29 October 2026, and each one links to where it was read. Every claim about WrenchTime comes from its own feature documentation.

Spritmonitor, Fuelio, Drivvo and Fuelly are trademarks of their respective owners. This comparison is independent: WrenchTime is not affiliated with, sponsored by or endorsed by any of them.

Spritmonitor vs WrenchTime at a glance

Spritmonitor and WrenchTime both log fill-ups, charging sessions, costs and reminders, and both run on iPhone, iPad and Apple Watch. They differ in what sits around the fuel log: Spritmonitor adds a public database of other drivers' consumption, WrenchTime adds maintenance scheduling, automatic trips, OBD-II and CarPlay.

Sources: Spritmonitor on the App Store, Wikipedia, WrenchTime feature documentation, checked 29 October 2026. "Not listed" means the App Store description and version history do not mention it.

Fuel and EV charging logs: how each one records them

Spritmonitor's app records fill-ups, expenses and reminders, works offline and syncs later, and can scan an invoice to fill in the date, price and quantity, according to its App Store listing. It also tracks tyre mileage and attaches PDFs or photos to an entry.

For electric cars, Spritmonitor's listing calculates efficiency for partial charges, and its April 2025 and April 2026 releases added charged energy calculated from the battery percentage before and after, and statistics that separate AC from DC charging.

WrenchTime's fuel log computes tank-to-tank consumption from fill-ups marked as full, and a missed fill-up flag excludes an interval instead of producing an impossible figure. Its charging log records energy, charger type (Level 1, Level 2 or DC fast), battery percentage before and after and location, and works out a home charging ratio. Units follow the driver's choice: MPG, L/100 km, km/L, mi/kWh or kWh/100 km.

Comparing your consumption with other drivers

Comparing with other drivers is Spritmonitor's distinctive feature. Other users' entries can be viewed on the site, and the app's listing offers to compare your consumption with other drivers of the same car model. A buyer can look up what owners of a model actually record before choosing it.

WrenchTime does not compare your car with other drivers. Its charts compare your car with itself: an efficiency trend, cost per distance and an alert when consumption drops meaningfully against your own history. Its log stays in your own iCloud rather than in a shared database.

Spritmonitor app account, data and privacy

Spritmonitor syncs a vehicle's log with the Spritmonitor website, and registration is optional on the website. Since August 2026 the app lets an anonymous account be converted into a full one, and its App Store privacy label lists precise location and a user ID as data linked to you. A CSV export of fuel-ups or costs is available in the app since October 2026, and import and export also run through the website.

WrenchTime has no account, no login and no server of its own in the path: the log is stored on the device and synced through the owner's private iCloud database. A vehicle can be shared with family or a co-driver over iCloud, so everyone's fill-ups, services and trips land in the same log, a WrenchTime Pro feature.

Other fuel log apps: Fuelio, Drivvo and Fuelly

Fuelio, by Sygic, is a free fuel log with a paid Premium tier. Its iPhone listing names CarPlay support with nearby stations and prices, Home Screen widgets, a Trip Log that records trips automatically, no account and no ads, with data kept on the device and an optional iCloud Drive backup.

Drivvo runs on Android, iOS and the web, according to its FAQ. Its free plan carries ads and covers up to two active vehicles; paid plans add more. It lists community fuel prices at over 600,000 stations in more than 190 countries and territories, income tracking for rideshare drivers and fleet management.

Fuelly is an iPhone fuel log that syncs with the Fuelly.com website, supports eleven fuel economy units and service reminders, and offers a Premium subscription that removes ads and adds attachments.

Of the apps on this page, WrenchTime is the one that reads the car itself over OBD-II, with live engine data on the phone and on CarPlay: the App Store listings of Spritmonitor, Fuelio, Drivvo and Fuelly, checked 29 October 2026, mention no OBD-II. The OBD-II app guide covers the adapters it works with.

Which fuel log app should you choose?

Each of the five apps fits a different driver. The list below is alphabetical, and every line names the need that app answers best, from its own listing.

• Choose Drivvo if you need Android, iPhone and the web on one account, or you track rideshare income or a small fleet.
• Choose Fuelio if you want a free fuel log with no account and nearby fuel prices on CarPlay.
• Choose Fuelly if you want an iPhone log that syncs with the Fuelly.com website.
• Choose Spritmonitor if you want to compare your consumption with other drivers of the same model, or keep the same log on the website and on iPhone.
• Choose WrenchTime if you want fuel, charging, maintenance and automatic trips in one iPhone log with no account, shared over iCloud, plus live engine data over OBD-II.

How to move your Spritmonitor data to WrenchTime

WrenchTime recognises Spritmonitor exports automatically. Spritmonitor's website exports a fuellings file and a costs file for each vehicle; import both into the same WrenchTime vehicle. The files carry no units, so the preview asks which ones your Spritmonitor account was set to before anything is saved.

The preview flags duplicates, fill-ups and charging sessions arrive with their costs and odometer readings, and every import gets a tag of its own so it can be removed in one step. Import is part of WrenchTime Pro. The import guide walks through the export on Spritmonitor's side and the mapping on WrenchTime's.

Try WrenchTime alongside your Spritmonitor log

You do not have to stop using Spritmonitor to try WrenchTime. The free version covers 1 vehicle and 3 fuel entries a month, 10 recorded trips a week and OBD-II live data, so you can log the next fill-ups in both and see which one you keep opening. When you are ready, the Spritmonitor import brings the whole history across.