For Act 60 law firms, CPAs and relocation firms
A Puerto Rico day count your team can check.
One83 is an iPhone and Android app your clients use to track their days in Puerto Rico. Days fill in on their own from flights and calendar, and anything missing can be added by hand. At the end of the year, your team gets every day, with where it was spent and where that entry came from.
One83 is a tracking tool. It does not provide tax or legal advice.
A client’s 2026, day by day
Sample186days in Puerto Rico, out of 365
From your client’s phone to your team.
Your client keeps the app. Your team gets the year, in files you can read, sort and check.
- Your client
Days fill in
Flights and calendar entries fill in the days, and booked trips are counted ahead. The data stays on the phone.
- The app
Gaps by hand
Anything missing can be added by your client or your team. A day the app can’t place is never guessed.
- The export
Year-end export
Pick the tax year and the app builds the record as a PDF and a CSV, plus a year-end report.
- Your team
Files to check
Read the report, sort the CSV, or open the share file in any browser. Each client sends their own.
This is what your team receives.
A sample year-end report for a made-up client. The answer comes first, then the report itself, with a note on each part.
One83 year-end presence report
Tax year 2026. Made-up client, made-up data.
Headings and wording are the app’s own. Only the client and the numbers are invented.
Presence test results
- 183 days of presence
- 186 of 183 days of presence.
- No more than 90 days in the US
- 84 counted US days.
- More days in PR than the US
- 186 days of presence against 84 counted US days.
- 549 days over three years
- 552 of 549 days across three years, with at least 60 in each.
Each presence test that is counted in days, with the counts it rests on. The report gives counts, not tax or legal advice.
Month by month
Every day of the year, grouped by month: Puerto Rico, the US or elsewhere. July was spent entirely on the island.
186 Puerto Rico + 84 US + 95 elsewhere + 0 unspecified + 0 unresolved + 0 without data = 365 days. Every day counts exactly once; a day partly in Puerto Rico counts as a Puerto Rico day.
The line that adds every status up to the days in the year. A day the app couldn’t place would show here as unresolved, not as a guess.
Day by day record
Flight data, location data, manual entry or the move-in date. A day set by hand is marked, so you know which ones to ask about.
date, status, source, away_region, exception, times, noteOne row per day, ready to sort, filter and total.
Less chasing clients for records at year end.
If you ask Act 60 clients to keep a day log, or a travel log with boarding passes and receipts, One83 keeps that log for them as the year goes.
No travel log to rebuild
The year arrives day by day, instead of a log pieced together in January from emails and boarding passes.
Each day shows its source
Flight data, location data, manual entry or the move-in date. Check the days you need, skip the rest.
Nothing is guessed
A day the app can’t place stays unresolved until someone fixes it. It never fills the gap on its own.
Your team can fill gaps
Anything missing can be added by hand, by your client or by your team, and a day set by hand stays as it was set.
Try it the way your client would.
Download One83, track a few days, add one by hand and export the year. You’ll see exactly what your clients would send you.
Then tell us what it’s missing for the way your firm works. We’d love to hear from you, and we’re always happy to talk.