Borderly What Borderly
actually does.
Automatic GPS tracking, a tamper-proof record chain, and scoped professional access. No other consumer app combines all three.
- Background GPS
- Jurisdiction detection
- Offline recording
- Import records
- Hash chain
- RFC 3161 timestamps
- Blockchain anchoring
- Public verification
- Scoped access
- Audit logging
- Verification tokens
- PDF reports
- Evidence vault
- Date-linked files
- Encrypted at rest
- Soft-delete recovery
- Goal tracking
- Threshold alerts
- Scenario planning
- Year-end projections
Background location recording
Borderly runs quietly in the background on your phone, recording your physical location with GPS precision every day. There is nothing to remember, no buttons to press, and no manual entries to make.
The app is designed to be battery-efficient while still capturing every jurisdiction transition. When you cross a state line or land in a new country, Borderly knows.
Location tracking can work even when you're offline or out of cell range — your presence history is always complete, even after flights, remote travel, or periods without connectivity.
- Battery-efficient background operation
- Tracks your location even offline
- Multi-jurisdiction detection
- Timezone-aware date assignment
Proof flow · Record chain
DigiCert Timestamp Authority
2026-07-14T16:22:09Z · RFC 3161
Merkle root → Polygon block
#891,442 · 02c3 · 7a4d · b811
Tamper-evident cryptographic hash chain
Every presence record you create is hashed and linked to the previous record in a cryptographic chain. This means any modification to any record — past or present — breaks the chain in a way that is mathematically detectable.
On select tiers, each record can be independently timestamped by DigiCert, a globally trusted certificate authority. These timestamps prove not just what was recorded, but exactly when it was recorded — creating contemporaneous evidence of your presence.
Your records can also be anchored to the blockchain, creating an immutable, publicly verifiable proof of data integrity that does not depend on Borderly existing as a company. Available on higher tiers.
- Each record links cryptographically to the previous one
- Any modification breaks the chain
- Mathematically verifiable integrity
- Trusted timestamps from DigiCert (paid tiers)
- Optional blockchain anchoring (paid tiers)
- Independently verifiable by anyone
Encrypted document storage with context
Your presence records tell the story of where you were. The Evidence Vault lets you attach the supporting documentation that proves it. Photos of boarding passes, hotel receipts, lease agreements, utility bills — anything that corroborates your physical presence.
Every file is encrypted at rest and linked to a specific date and jurisdiction. When you generate a report, the relevant evidence is referenced alongside the presence records it supports.
Deleted evidence enters a recovery window before permanent removal, giving you time to restore anything removed by mistake.
- Photos, receipts, boarding passes, lease agreements
- Encrypted at rest
- Linked to specific dates and jurisdictions
- Soft-delete with recovery window
- Secure upload and download
- Referenced in verified reports
Prove your presence with daily automated phone calls.
Set up automated calls ›Residency thresholds with real-time progress
Tax residency rules are not one-size-fits-all. Some jurisdictions require a minimum number of days. Others impose a maximum. Some use ratios or percentages. Borderly supports all of these goal types and tracks your progress against them in real time.
Goals are scoped to specific year periods and update automatically as new presence records are created. You always know exactly where you stand relative to every threshold that matters.
Our planning tools let you model "what-ifs" by adding future planned days onto your calendar. Our overviews combine your actual recorded days with planned days to show projected outcomes before the year is over.
- Minimum and maximum day targets per jurisdiction
- Ratio and percentage goals
- Scenario planning with what-if projections
- Combined actual and planned progress views
- Yearly goals with period scoping
The details that matter.
Verified PDF reports
Presence summary with hash chain verification and evidence references. Independently verifiable.
US states · Canadian provinces · Countries · Cities
One model handles every jurisdiction type.
Domicile change history
Full timeline of domicile changes with dates and documentation.
Import existing records
Bring in your existing day-count history from any source.
Threshold alerts
Notification before you approach a limit — not after you cross it.
Offline operation
Records your jurisdiction even without cell service. Syncs when reconnected.
Start tracking your
days today.
Try Borderly free for 60 days. No credit card required.
No credit card required. Available on iPhone and web.