Know exactly
where you stand.
Borderly tracks your physical presence with cryptographic precision — so you're always prepared for tax residency questions.
Trusted by individuals, tax attorneys, and advisors
Everything you need to
prove your residency
A complete system — from automatic GPS tracking to court-ready PDF reports — built to meet the highest standards of evidence integrity.
Automatic Tracking
GPS-precise location tracking runs automatically in the background on your iPhone — no manual input required.
Cryptographic Proof
Every day recorded creates a tamper-evident hash chain you can present to any tax authority with confidence.
Evidence Vault
Attach photos, receipts, hotel confirmations, and documents directly to your location records.
Goal Tracking
Set minimum or maximum day targets per jurisdiction and track your progress against those goals in real time.
Attorney Access
Grant your tax attorney view-only or report access to your data — with a complete audit trail of every access.
Verified Reports
Generate cryptographically signed PDF reports ready for submission to tax authorities worldwide.
From first location to
verified report
Download the iOS app
Install Borderly on your iPhone and automatic tracking starts immediately. Your location is recorded with GPS precision every day — nothing to configure.
Capture supporting evidence
Attach photos of boarding passes, hotel receipts, lease agreements, and any other documents directly to your daily records as you go.
Share with your attorney
Invite your tax attorney with scoped access in seconds. They see only what you allow — with a full audit log of every view and download.
Generate verified reports
Produce a cryptographically signed PDF — complete with hash chain, RFC 3161 timestamps, and blockchain anchoring — ready for tax authority submission.
Built for the highest
standards of evidence integrity
Every record you create is backed by Swiss bank grade security.
SHA-256 Hash Chain
Each record cryptographically links to the previous one. Any tampering — anywhere in the chain — is mathematically detectable.
RFC 3161 Timestamping
Trusted third-party timestamps from accredited timestamping authorities prove when each record was created.
Blockchain Anchoring
Merkle roots of your records are anchored to the Polygon blockchain — providing immutable, public proof of data integrity.
Complete Audit Trail
Every access to your data — who viewed it, when, and from where — is logged and available to you at any time.
Public record verification
Anyone can independently verify the integrity of your records using our public verification tool — no account required.
Built for tax attorneys
and advisors
Manage all your clients in one place. View their presence history, generate reports on their behalf, and share cryptographically signed PDFs with tax authorities — all with a complete, immutable audit trail.
Request professional accessProfessional features
- Multi-client dashboard with presence history
- Delegated access with granular permission scopes
- Jurisdiction-level viewing restrictions
- Report generation on behalf of clients
- Full immutable audit log of all access events
Law firm plan available
Unlimited clients · Team access · Priority support
Borderly has transformed how I prepare residency documentation for my clients. The cryptographic proof chain is unlike anything I've seen in this space.
Sample Tax Attorney
New York, United States
Start tracking your
days today.
Free to download. Start knowing exactly where you stand.
No credit card required. Available on iPhone.