Choosing a mileage tracker app

There are a lot of these and most of the comparisons online are affiliate pages ranking whoever pays most. Here is what actually separates a good one from a bad one, based on what makes people abandon them.

Automatic detection is the whole game

Every manual system fails the same way: you forget. Not always, just often enough that the log has gaps, and gaps are what make a log unreliable. An app that starts recording by itself when the vehicle moves removes the discipline problem entirely, which is the single largest factor in whether your log is complete in April.

If an app requires you to press start, it has the same failure mode as a paper notebook with extra steps.

Battery drain, which nobody mentions until it is a problem

An app holding continuous high accuracy GPS will visibly shorten your day, and that is the most common reason people uninstall these. Better implementations use the phone's motion sensors to decide when a drive has probably started and only then bring up GPS. Read the reviews specifically for battery complaints, because they are usually accurate.

The export is what you are actually buying

You are not buying trip recording, you are buying a document that satisfies the IRS and your accountant. Check before committing that the export includes date, start, destination, purpose and miles per trip, that you can export a full tax year in one go, and that it comes out as CSV or PDF rather than trapped in the app. An app you cannot get your data out of is a liability.

Classifying trips has to be fast

Every recorded trip needs marking as business or personal. If that takes more than a swipe, you will fall behind and end up with a month of unclassified drives you can no longer remember. Look for bulk classification and rules, such as automatically treating a regular route as business.

What free tiers usually mean

Most free tiers cap trips per month. That is genuinely fine for occasional driving and useless if you drive all day. Count roughly how many separate trips you make in a month before choosing, because discovering the cap in July and losing five months of tracking is the worst outcome available.

Where your data goes

A mileage app knows everywhere you have been. Read what the company says it does with location data, and be wary of free apps with no obvious business model, because the data is the business model. This applies to mine as much as anyone else's, and you are entitled to ask.

The honest summary

Pick one that records automatically, does not flatten your battery, and gives you a clean export. Beyond that the differences are mostly presentation. The best mileage app is the one still running in December, because the log only has value if it is complete.

What that log has to contain is covered in IRS mileage log requirements.