Tax residency tracker apps compared (2026)
Updated . Not tax or legal advice.
Several iPhone apps count your days by state for tax residency. Prices run from about $3 a month to $20 a month. The best-known, Domicile365, has about 236 App Store ratings; most others have fewer than 70. Recent reviews across the category most often complain about tracking that broke after an update.
Disclosure: we make Domicile Ledger, an app in this category that is not available yet. We list it last and do not rate it. Prices and ratings below were checked on October 20–21, 2026; check the App Store for current terms.
The apps
| App | Price (US) | App Store ratings | Notes |
|---|---|---|---|
| Domicile365 | $19.99/month, 60-day trial | 4.8 (about 236) | Signed PDF reports, advisor portal for your CPA, iOS, Android, Mac and Windows. FAQ |
| TaxDay | $9.99/month | 3.8 (about 65–71) | GPS tracking, all 50 states, reports for your tax preparer. Several 2025–2026 reviews report tracking problems after updates. reviews |
| iReside | $44.99/year or $4.99/month | 4.8 (about 64–66) | States, Canadian provinces and countries; visa trackers; PDF and CSV reports. Released 2026. |
| Sarmiza (Tax Residency Tracker) | $19.99–$79.99/year; lifetime $99 | 4.2 (about 58) | Offline, no account, builds a timeline from photo locations. Some 2025 reviews report broken tracking after an update. |
| TrackingStates | $2.99/month | 2.6 (5) | Simple US state tracking; data in your iCloud. |
| Days in State | $19.99/year or $39.99 lifetime | — | On-device storage; free web tools. |
| Domicile Ledger (ours) | Not released; planned $99/year | — | Day count plus a New York to Florida domicile checklist and evidence linked to each day. Free web tools available now. |
What to check before you pick one
- Reliability after updates. Read the newest reviews, not the average. Missed days are the most common complaint in this category.
- Gaps are visible. The app should show days with no record so you can fix them, because days you cannot prove may count as New York days. Hodgson Russ
- Correct day rule. For New York, any part of a day counts, and one date can count for two states. CBIZ
- Export for your CPA. PDF and CSV with every day, and ideally a way to show the records were not edited later.
- Manual entry and import. You will need to add days from before you installed the app.
- Privacy. Check whether location history stays on your phone or goes to the company's servers.
- Support. Check whether the developer answers reviews and support email.
Questions people ask
What is the best app to track days for state tax residency?
It depends on what you need. Domicile365 has the most ratings and features for CPAs at $19.99 a month; cheaper apps such as iReside and Days in State cost $20–45 a year. Check recent reviews for tracking problems and make sure the app exports every day for your CPA.
Do I need an app, or is a spreadsheet enough?
A spreadsheet works if you fill it in every day and keep third-party proof such as card and phone records. An app logs location automatically, which helps if you travel often. Either way, auditors want proof for each day. Hodgson Russ