Tax Days vs. Monaeo
Monaeo has been the category leader for high-net-worth residency tracking for over a decade. Tax Days takes the same problem and brings it to the iPhone with privacy as a first-class concern. Here's how they compare honestly.
Pricing at a glance
Privacy-first iPhone app. No accounts, no servers. Optional iCloud sync via Apple's encrypted CloudKit.
Long-running enterprise residency tracker with background GPS, audit-defense services, and white-glove support — built for ultra-mobile UHNW individuals and family offices.
Feature comparison
| Feature | Tax Days | Monaeo |
|---|---|---|
| Annual cost (individual) | $19.99/year | $1,200+/year |
| Free tier | Yes (limited rules) | No |
| Tracking method | Manual trip entry (privacy by design) | Background GPS (continuous tracking) |
| Data location | On your iPhone (SwiftData) + optional iCloud (CloudKit) | Monaeo's servers |
| US states | All 50 with state-specific abode rules | All 50 |
| Schengen 90/180 | Yes (rolling window) | Yes |
| UK SRT | Yes (ties + days) | Yes |
| International rules | 30+ countries, 80+ rules total | Hundreds of rules |
| Audit-defense services | Audit-ready PDF export | Included in higher tiers |
| Platform | iPhone (iOS 26+), Mac via Catalyst | iOS, Android, web |
Which one is right for you?
Tax Days is best for…
- Snowbirds, digital nomads, expats, remote workers, athletes.
- Anyone with sub-$10M income who wants beautiful, accurate, private day-count tracking.
- iPhone users who want zero data on a vendor's server.
- People who'd rather pay $20/year than $1,200/year.
Monaeo is best for…
- Ultra-mobile UHNW individuals with multi-jurisdiction tax exposure.
- Single-family offices managing tax for principals.
- Anyone who wants background GPS auto-tracking instead of manual entry.
- Anyone who wants a vendor relationship with audit-defense services.
Bottom line: If you have multi-million-dollar exposure across many jurisdictions and want a high-touch service relationship, Monaeo is a credible choice. For 99% of cross-border residents, Tax Days at $19.99/year is the right answer.
Ready to try Tax Days?
$19.99/year. No accounts. No tracking. Free tier with limited rules.