Southbound tells you exactly how many days you can still spend outside Florida — and builds a precise, timestamped record for when your CPA asks, or the state does.
Auto Tracking
Active
iCloud Backup
Zero Southbound servers
0
States with income
tax above 5%
Tax Foundation, 2025
Top marginal rates. Source: Tax Foundation, 2025
New: The Florida House voted to eliminate property tax on primary residences starting 2027. (HJR 203, pending voter approval)
You've made the move — or you're making it. You know the 183-day rule isn't a suggestion. It's the line between Florida residency and a six-figure tax bill from the state you left.
You've changed your domicile to Florida but still own property or have ties in New York, California, New Jersey, or Connecticut. Those states are aggressive about residency audits. You need documentation that holds up.
You spend winter in Florida and summer elsewhere. The exact count matters. One day short and a state auditor has grounds to challenge your residency claim. Southbound tracks every day, automatically.
Your CPA or wealth advisor has told you to keep a log of your Florida days. Southbound replaces the spreadsheet you never update. Export a clean report whenever they ask.
Other apps count days in Florida. Southbound tells you the only number that matters: how many more days you can spend outside it.
days you can spend outside Florida
Your friend invites you to a week in the Hamptons. Open Southbound. One number tells you if you can go.
Get notified when your departure budget is running low. Never accidentally overstay a trip and lose your residency claim.
See exactly how many travel days you have left. No mental math, no spreadsheets, no guessing at year-end.
Designed for people who value their time. Every screen serves a purpose.
Dashboard
Calendar
Settings
Welcome
Privacy First
Location Access
Automatic tracking. On-device storage. Audit-ready exports.
Uses iOS significant location changes to detect when you enter or leave Florida. No check-ins, no manual logging. Minimal battery impact.
One number tells you how many days you can still spend outside Florida. No mental math — just open the app and know.
Export a date-by-date CSV report with Florida status and confidence levels for each day. Share directly with your CPA or tax attorney.
No Southbound servers, no user accounts, no analytics. Your data stays on your iPhone and your personal iCloud account. We never see it.
View your complete travel history at a glance. See which days you were in Florida and manually override any date that needs correction.
Your residency record syncs to your iCloud account automatically. Upgrade your phone, restore from backup — your data follows you.
Grant "Always Allow" during setup. Southbound uses low-power location monitoring, not continuous GPS. Battery impact is minimal.
When your phone detects a meaningful location change, Southbound checks whether you're inside the Florida state boundary. No check-ins required.
See your running Florida day count, calendar view, and projection toward 183. Manually override any date that needs correction.
Generate a date-by-date report and share it with your CPA or tax attorney. Includes confidence levels based on GPS accuracy.
States with high income taxes — New York and California in particular — have dedicated residency audit units.
How many days did you spend in each state? The burden of proof is on you.
Where is your home? Where do you vote? Where is your doctor?
Where are your bank accounts, business operations, and club memberships?
New York uses a "near and far" test weighing time, business, family, possessions, and social connections.
A residency audit can take years and cost tens of thousands in legal fees — before any tax liability. The single most important piece of evidence is an accurate, contemporaneous log of where you were, every day. Not reconstructed from credit card statements after the fact. Not a calendar filled in from memory. A record made at the time, automatically.
That's what Southbound provides.
Southbound has no servers, no user accounts, and no analytics. Your location data is stored on your iPhone and backed up through your personal iCloud account. We never receive, process, or have access to any of it.
Your Florida day record syncs to your iCloud account automatically. Lose your phone, get a new one, sign in with your Apple ID — your data is there.
We don't operate servers, databases, or cloud infrastructure. There is no "Southbound account" and no data on our end to breach, subpoena, or sell.
iCloud data is encrypted in transit and at rest. Your residency record is protected by Apple's standard iCloud security model — the same infrastructure that guards your photos and health data.
If you advise clients on state tax residency, you know the conversation. Your client moved to Florida. They're confident they've spent enough time there. But when you ask for documentation, you get a best guess, a partial calendar, or nothing at all.
Contemporaneous records carry more weight than reconstructed ones. A log created automatically at the time is stronger evidence than credit card statements assembled after a notice arrives.
Southbound creates that record passively, every day, without requiring your client to remember anything. No data passes through our servers — everything stays on your client's device and their personal iCloud account.
Recommend it to your clients. It costs less than one billable hour.
Less than one billable hour. Less than 0.2% of what you'll save.
Annual Plan
That's just $20.75/month
Free during early access · by invitation
Most states — including New York, California, New Jersey, and Connecticut — consider you a statutory resident if you spend 183 or more days in the state and maintain a permanent place of abode there. By spending 183+ days in Florida, which has no state income tax, you strengthen your claim to Florida domicile and reduce the risk of being taxed by your former state. The specific rules vary by state. Consult your tax advisor.
Southbound does not use GPS. It monitors cell tower and Wi-Fi network changes — the same low-power system Apple uses for Find My. When your phone detects a meaningful location shift, Southbound checks whether you're inside the Florida state boundary and records the result locally. Most users see zero measurable battery impact.
Yes. Southbound has no servers and no user accounts. Your data is stored on your iPhone and backed up through your personal iCloud account — the same Apple infrastructure that protects your photos and health data. We never receive, store, or have access to your location information. When you export a report, it travels through your iPhone's native share sheet — you decide where it goes.
Your data is backed up automatically through iCloud. Sign in with your Apple ID on your new device, install Southbound, and your complete residency record will be there. No export/import process, no account to recover — it works the same way your other iPhone data does.
Southbound creates a contemporaneous, automatically-generated record of your presence in Florida — which is the strongest form of day-count evidence in a residency dispute. However, day count is one factor among several that states examine. Southbound is a documentation tool, not legal advice. Work with a qualified tax attorney for audit defense.
A date-by-date record showing Florida or non-Florida status for each day, along with confidence levels based on GPS accuracy. Days you've manually overridden are clearly flagged. The report can be exported as a CSV file for use by your tax professional.
$249 per year after launch. The app is currently free during the early access period.
Install Southbound, grant location access, and let it run. The next time your advisor asks how many days you've been in Florida — or a state auditor does — you'll have the answer.
iPhone only. By invitation during early access.