Geofencing vs GPS Time Tracking: What Is the Difference?
GPS tracking tells you where a punch happened after the fact. Geofencing decides whether the punch is allowed to happen at all. Here is the difference, and why it matters at payroll.
You searched for the difference between geofencing and GPS time tracking because a sales page used both words as if they meant the same thing. They do not. One records where a clock-in happened and shows you a dot on a map later. The other acts on the location at the moment the worker punches in. If you run a field crew and you are trying to stop off-site clock-ins, that difference decides whether you find out at payroll or fix it at the punch.
This post lays out both plainly, shows you what each one does for you and what the worker experiences, and explains how Clox does both at once. No hype, and an honest note about what phone-sourced location can and cannot promise.
The short version
GPS time tracking is a record. It captures the coordinates where a punch happened and stores them. You review it after the fact, usually when you notice something looks off. It is evidence, not enforcement.
Geofencing is a rule. A manager draws a boundary around a job site, and the app checks the worker's location against that boundary at the moment they clock in. Depending on the tool, it warns, flags, or blocks. Clox blocks the off-site punch outright so the bad clock-in is never created.
Side by side
Here is how the two compare on the things a crew owner actually cares about. Note that these are not competing choices. Clox records the location and enforces the fence, so you get both columns.
The row that matters most is the last one. With plain tracking, an off-site clock-in still lands in your timesheet, and it is on you to spot it before it hits payroll. With enforcement, it is not there to spot.
How Clox geofencing actually works
You open a worksite on a map and draw a radius around it. The default is around 200 meters and you adjust it per site, so a small residential job and a large yard can have different boundaries. Enforcement is per employee, which means you choose which crews it applies to. People who bounce between sites all day are not forced to fight a fence at every stop.
When the fence is enforced for a worker, a clock-in from outside it is blocked at the punch. The off-site punch is never created, so there is nothing for you to catch and correct later. Most tools that call themselves geofencing only warn or note the distance. Clox blocks.
GPS is not perfect, so there is a grace band. A punch just outside the radius can still land if it falls within the phone's own reported accuracy, capped at 100 meters. Those allowed-but-marginal punches are flagged for you with an "Off the worksite" readout to review at approval. A fix too coarse to trust, worse than about 500 meters or wider than the fence itself, is rejected as too inaccurate to place anyone.
At approval you may also see three review flags, in priority order: mock_location means the device reported a fake or mock GPS provider, impossible_travel means the punch is impossibly far from that same worker's previous punch, and low_accuracy means a coarse but in-fence fix. You decide what to do with each. The app does the checking and surfaces the exceptions.
The honest limits
The location comes from the worker's phone. That is worth saying plainly, because any tool that promises more than that is overselling. Geofencing is a strong deterrent, not a guarantee. It is not foolproof and it is not tamper-proof. Someone determined enough can try to fake a location, which is exactly why Clox flags mock providers and impossible travel instead of pretending phone GPS is beyond question.
What geofencing does well is remove the easy, casual off-site clock-in and give you a short, honest list of the punches worth a second look. That is a real improvement over a map full of dots you have to interpret. It is not a promise that no one will ever try something. Treated as a deterrent with a review layer, it does its job.
One more note on identity. On a shared tablet in kiosk mode, Clox captures no GPS at all. Identity there is the on-site tablet plus the worker's PIN, not a location fix. Geofencing applies to clock-ins from a worker's own phone.
Common questions
If Clox records location too, why do I need the fence?
Because a record only helps if you review it, and you are busy. Recording the location gives you evidence after the fact. The fence stops the bad punch before it exists, so most weeks you have nothing to review. You get the map dot when you want proof, and the block when you want prevention. That is why Clox does both rather than making you pick.
Will this punish honest workers who move between sites?
It does not have to. Enforcement is per employee, so you turn it on for the crews tied to a fixed site and leave it off for the ones running between jobs all day. The people who genuinely move around are not fighting a boundary at every stop.
What happens right at the edge of the boundary?
A punch just outside the radius can still go through if it falls within the phone's reported GPS accuracy, up to 100 meters. Clox flags those as marginal so you can see them at approval. A fix too coarse to trust is rejected. You are not stuck choosing between blocking honest people and letting everything through.
Is plain GPS tracking ever enough on its own?
If you only need an after-the-fact record and you trust the crew to clock in on site, a plain location log may be all you want. The moment you need to actually prevent off-site punches rather than review them later, tracking alone falls short and you want enforcement. That is the line this whole comparison comes down to.
Where Clox fits
Clox is time tracking for field crews. One-tap clock-in, overtime and breaks calculated automatically, and payroll-ready exports for QuickBooks, Gusto, ADP, and Paychex. Geofencing is one part of it, layered on top of the location record so you get both the dot on the map and the block at the punch. You can read the full picture in our guide to the best time tracking app with geofencing, and if enforcement is really about payroll leakage, our writeup on how to spot and stop time theft covers the money side. For the wider view of tracking a field team, see the field crews pillar.
Trying it costs nothing to start. You get 14 days free, no credit card to begin, and a 30-day money-back guarantee. You can start a free trial and see the plans on the pricing page. The iPhone app is on a TestFlight beta, and anyone can also clock in from a phone browser at app.getclox.com.