So far so great
Been using this for a couple of months and I’m very impressed. Unlike some tracking apps, this identifies your location hourly, even if you’re not moving. This will be very helpful in the event of a tax audit.
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About
This app provides court-grade evidence for tax audits by compiling location data, travel records, and expense receipts. It is designed to support defensible location records and resolve audits confidently and quickly.
✓Court-grade tax audit evidence
✓Supports tax domicile and residency
✓Income allocation and UBT tracking
✓Proprietary location algorithms
✓Corroborates residency with travel and expenses
✓Audit-ready evidence output
✓Concierge-style user support
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What's New in Null Island
1.04
February 23, 2026
Streamlined user experience.
User reviews
FAQ
What is Null Island used for?
Null Island is a companion application for taxpayers and their advisors to generate court-grade evidence for tax audits. It helps establish tax domicile, residency, and income allocation by compiling location data and other relevant records.
Is Null Island secure?
Yes, Null Island is a privacy-first company. Data is encrypted at rest and in transit, stored on secure servers in the US and EU, and is never sold or disclosed. You control data retention and export.
What kind of evidence does Null Island provide?
Null Island provides court-grade evidence designed to support defensible location records. It integrates travel records, expense receipts, toll records, selfies, and app location data to corroborate your residency story.
How does Null Island help with tax audits?
Null Island is engineered for audit scrutiny, producing case-ready outputs that can be reviewed or submitted directly. This helps taxpayers and advisors resolve audits quickly and confidently, potentially avoiding back taxes, penalties, and interest.
Does Null Island offer support?
Yes, Null Island offers a concierge-style experience with real people available to help users get set up, stay on track, and feel confident before and during an audit. You can reach out to support@nullisland.ai.
What devices does Null Island support?
Null Island is currently supported on iPhone devices. The app was last updated on February 23, 2026, with version 1.04.
Is Null Island free to use?
Yes, Null Island is available for free. There are no in-app purchases or advertisements associated with the application.
Does Null Island provide tax advice?
No, Null Island does not provide tax or legal advice. Users are advised to consult their professional advisors for guidance specific to their situation.