Best Tax Residency Tracker Apps 2026: Complete Comparison
An honest 2026 guide to the best tax residency tracker app: TaxBird, Domicile365, Monaeo, Topia, iReside, and Tax Days compared on price, coverage, GPS, and privacy.
The best tax residency tracker app for most people in 2026 is the one that covers the jurisdictions you actually live in, counts days the way auditors do, and exports clean records when your accountant asks. For US snowbirds, TaxBird is the established name; for corporate mobility teams, Monaeo and Topia dominate; for international and cross-border individuals who want broad coverage without GPS surveillance, Tax Days is the newer challenger. Below is an honest, feature-by-feature breakdown so you can pick the right one.
All six apps solve the same core problem: a single misplaced day can flip you into statutory residency and expose your worldwide income to tax. They differ enormously in who they're built for, how aggressively they track location, and what you pay. Here's how they stack up.
What actually matters in a residency tracker
Before comparing logos, get clear on the five things that separate a useful tracker from a glorified calendar:
- Jurisdiction coverage. Do you only worry about NY ↔ FL, or do you also count days against the Schengen 90/180 limit, the UK SRT, or a 183-day rule abroad? Single-country apps fall apart the moment you cross a border.
- Counting accuracy. A part-day usually counts as a full day, and layovers, transit, and partial days are where people get burned. The tracker must match how each jurisdiction actually counts.
- Evidence quality. An audit is won with contemporaneous records. The app should export a defensible day-by-day log, not just a number.
- Privacy and data model. GPS-based apps track your phone's location 24/7. Trip-based apps store only the dates and places you enter. That distinction matters if you'd rather not hand a third party a continuous map of your movements.
- Price and who pays. Enterprise tools are billed to employers and priced accordingly; consumer apps run a flat annual fee.
The six apps at a glance
Pricing below is approximate and changes often, always confirm on each vendor's site before buying. The point of the table is the shape of each product, not the exact dollar figure.
| App | Built for | Tracking method | Coverage | Roughly |
|---|---|---|---|---|
| TaxBird | US snowbirds & individuals | GPS / location | US states (strong on day counts) | Mid annual subscription |
| Domicile365 | US individuals & advisors | GPS / location | US states + some intl | Annual subscription |
| Monaeo | Executives & enterprises | GPS / location | US states + global | Premium / enterprise |
| Topia | Corporate mobility teams | Travel + location data | Global, multi-employee | Enterprise contract |
| iReside | Privacy-marketed individuals | GPS / location | US states + Canada + intl | Low-mid annual subscription |
| Tax Days | International & cross-border individuals | Automatic (on-device) or trip-based | US states + many countries | Low flat annual |
GPS vs. trip-based is the single biggest fork in this category. GPS apps infer your day count automatically but require constant location access. Trip-based apps ask you to log trips (often pre-filled from your calendar or travel emails) and never see your live location.
For US snowbirds and individuals: TaxBird and Domicile365
TaxBird essentially defined the consumer category. It uses your phone's location to automatically tally days in each state and warns you as you approach a threshold, ideal for a classic NY-to-Florida snowbird who wants hands-off counting and lives entirely inside US borders. Its weakness is scope: it's built around US state residency and the domicile story, so international day counting is not its strength.
Domicile365 targets the same audience but leans toward people working with a tax advisor, with reporting designed to support a domicile-change claim. It also relies on location tracking. Both are solid if your entire residency question lives within the United States and you're comfortable with continuous GPS.
Automatic GPS counting is convenient until it's wrong. Phones lose signal, batteries die, and a missed ping near a state line can under- or over-count a day. Whatever app you use, sanity-check the days near your threshold against boarding passes and card statements.
For companies and executives: Monaeo and Topia
Monaeo built its reputation on high-earning executives and athletes whose multistate income is audited aggressively. It captures granular location data to produce audit-grade evidence, and it's priced as a premium product, frequently paid for by an employer or family office rather than the individual.
Topia is a different animal entirely: a global mobility platform for HR and tax departments managing many employees at once. It handles assignment tracking, compliance, and payroll implications across a workforce. If you're one person trying to stay under a day threshold, Topia is far more machinery than you need. If you run mobility for a multinational, it's in a different bracket than the consumer apps here.
For privacy-conscious individuals: iReside
iReside is one of the newest entrants, and it targets a similar audience to Tax Days: international, privacy-conscious travelers. It covers US states and territories, Canadian provinces, and international locations, and adds dynamic risk scoring and predictive threshold alerts on top of raw day counts. Its privacy pitch is different from Tax Days' though, iReside still runs background GPS and stores location history on its own servers; it just states that data isn't shared with third parties. If Canadian province-level tracking matters to you, iReside covers a gap the other apps here don't.
For international and cross-border individuals: Tax Days
Tax Days is the newest of the six and takes a deliberately different stance. It's trip-based, and it lets you choose how those trips get created: automatic background detection that proposes trips for you to confirm, or logging them yourself. Either way the location history is processed on-device and never reaches a server. It covers US states alongside many countries, so the same dashboard tracks your 183-day exposure abroad, your Schengen 90/180 window, and your home-state count at once. That makes it a fit for digital nomads, expats, and dual-country residents that the US-only apps don't serve well.
Because rules vary by jurisdiction, Tax Days encodes how each place actually counts days, including partial-day and arrival/departure conventions, and projects the exact date you'd cross a threshold if you keep your current pace. When an accountant asks for proof, it exports a contemporaneous day-by-day log. Storage is on-device with optional iCloud sync, which is the privacy trade-off many cross-border individuals prefer over continuous GPS.
In short, Tax Days was built for people whose residency question crosses borders, not just state lines, and for anyone who'd rather log trips than hand over a live location feed. See pricing for the flat annual cost.
How to choose the right one
- Pure US snowbird, want auto-counting, fine with GPS: TaxBird or Domicile365.
- High-income executive with aggressive multistate audit risk, employer pays: Monaeo.
- HR or tax team managing many mobile employees: Topia.
- Want automatic GPS tracking plus Canadian province coverage: iReside.
- International, expat, nomad, or dual-country, and want zero background location access: Tax Days.
- Spreadsheet curious? See spreadsheet vs. app before you commit either way.
There is no universally "best" tracker, only the best fit for your map. Match the app to the jurisdictions you live in, decide how you feel about GPS, and make sure whatever you choose can hand your accountant a clean log when it counts.
Frequently asked questions
What is the best tax residency tracker app in 2026?
It depends on your situation. TaxBird and Domicile365 are strong for US-only snowbirds who want automatic GPS counting; Monaeo and Topia serve executives and corporate mobility teams; iReside targets privacy-marketed international tracking with Canadian province support; and Tax Days is built for international and cross-border individuals who want broad country coverage without any location tracking at all.
Do tax residency trackers use GPS?
Most of the established ones (TaxBird, Domicile365, Monaeo, iReside) infer your day count from your phone's location, which requires ongoing GPS access. Trip-based apps like Tax Days instead let you log trips and never access your live location, storing only the dates and places you enter.
What's the difference between a snowbird app and a digital nomad app?
Snowbird apps are optimized for US state residency, counting days in your home state to protect a domicile change to Florida or another no-tax state. Digital nomad and expat tools also track international thresholds like the 183-day rule, the UK SRT, and the Schengen 90/180 limit across many countries at once.
Can a tracker app help me win a residency audit?
Indirectly, yes. Auditors reconstruct your days from phone records, card swipes, and tolls. A good app gives you a contemporaneous day-by-day log you can export, which is far stronger evidence than a memory reconstructed after the fact. The app records the days; you still keep the underlying receipts.
How much do residency tracker apps cost?
Consumer apps typically run a flat annual subscription, with Tax Days positioned at the lower end, iReside and TaxBird just above it, and Domicile365 further up. Monaeo is a premium product, and Topia is an enterprise mobility platform billed to employers. Always confirm current pricing on each vendor's site.
Is a free spreadsheet good enough instead of an app?
A spreadsheet can work if you cross one border on a simple schedule and update it religiously. It breaks down with multiple jurisdictions, partial-day rules, and rolling windows, and it won't warn you before you cross a threshold. See our spreadsheet-vs-app comparison for the trade-offs.