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About Daysium

Daysium is a day counting and tax residency evidence platform for globally mobile individuals. The app elegantly resolves the risks and complexities of day counting and record-keeping. Key Daysium Features: - Automated Location Logging: Your phone's GPS captures location data automatically, minimising the risk of gaps in your record. - Photographic Evidence: Upload geo-tagged photos to build an auditable record of your presence in each jurisdiction. - Multi-Jurisdiction Tax Rules: See your day count and status against each country's coded tax residency rules, wherever your travel takes you. - Strategic Planning: Model future travel against the rules, so you can see the impact on your day counts before you go. - No More Spreadsheets: Replace manual day counting with a single, reliable platform. Managing tax residence across multiple jurisdictions is complex, and one miscounted day can carry significant financial consequences. Daysium gives you the precision and the record to demonstrate reasonable care, without the manual effort. Daysium brings together rule establishment, planning, day counting and evidencing in one place — built for the complexity of modern, globally mobile lives. Follow us on LinkedIn: https://www.linkedin.com/company/daysium/

What’s new

Version 4.8.0 · Updated October 20, 2026

Bug fixes and performance improvements.

App privacy

The developer, Daysium, reported these privacy practices to Apple.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers: Device ID

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Identifiers: Device ID
  • Location: Precise Location, Coarse Location
  • Contact Info: Physical Address, Email Address, Name
  • User Content: Photos or Videos, Other User Content

Used for: Analytics, App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Product Interaction
  • Diagnostics: Crash Data, Performance Data, Other Diagnostic Data
  • User Content: Customer Support

Used for: Analytics, App Functionality

Alternatives to Daysium

Looking for apps like Daysium? Here are 6 similar apps on the App Store. The highest rated is Resident Tax (5.0/5), and all 6 are free to download.

Daysium vs. alternatives
App Rating Price Last updated Compare
Daysium – Free October 20, 2026
World Kite Residency Tracker 2.5 / 5 (6) Free Jun 6, 2026 Compare
Resident Tax 5.0 / 5 (13) Free Oct 18, 2026 Compare
Resident Live: Tax Residency – Free Oct 13, 2026 Compare
Coutts Crown Dependencies – Free Jul 19, 2026 Compare
Domicile365 Residency Tracker 4.7 / 5 (239) Free Oct 23, 2026 Compare
CIB - VELTA Mobile Banking – Free Aug 27, 2026 Compare

Compare Daysium with the top alternatives: ratings, updates, ASO score and keyword gaps →