writing off my mileage for 2017

[Jestin Sorenson]

2 questions. Somewhat related.

I've been using an app called MileIQ. It's able to track your miles by gps and it allows you to write notes about where you went and why. It only allows 40 trips for month. Is this app sufficient for tax purposes, to record my mileage? I can pay a monthly fee for unlimited trips of $5 a month with a discount. I've already gone over. Is it worth it to subscribe?

My other question, I spoke with a 'tax professional' and he said that if I was 1099, I could write off my miles to and from work. if my first commute is an office in my house, I could then write off the commute to my 1099 job. I can clarify better if this doesn't make sense. Is this legal? How much of a risk would I be taking? My in home business would be my duplex or other potential properties I obtain in the future. So managing my real estate portfolio at my in home office. Would that be sufficient to qualify?

Any help is appreciated, thanks!