Starling adds motion lock to banking app after rise in UK phone thefts

Starling Bank has introduced a mobile app security feature that uses a phone’s motion sensor to detect a sudden snatch and restrict access to the banking app. The launch follows Office for National Statistics data showing an estimated 272,000 reported phone theft incidents in the UK in the year to March 2025, a level that has put device theft higher on the risk agenda for banks and fintechs.

The control is aimed at a form of street theft in which offenders take phones from people in motion, including from bicycles or motorbikes. Finextra reported that such thefts are often linked to organised criminal groups.

Starling’s system uses the accelerometer and other built-in motion detection capabilities already present in smartphones. If the device movement matches a sudden grab, the bank’s app automatically freezes access. A customer who wants to reopen the app must then verify their identity using facial recognition, a fingerprint or a passcode.

The measure does not rely on a customer reporting the loss before the app is restricted. That timing is central to the risk: a stolen handset may remain logged in to some services, or may be taken while the owner is actively using it. Starling’s feature is designed to add a bank-level barrier at the moment the device appears to have been physically taken.

Bank controls move closer to street-crime risks

Mobile banking security has typically focused on account takeover, scams, malware and remote fraud. The Starling feature extends that perimeter to the physical handling of the device itself, using sensor data as a trigger for authentication rather than as evidence after a reported incident.

Harriet Rees, Starling’s chief information officer, said the bank has direct evidence from customers that phone theft is affecting them. Rees said customers contact the bank to report that a phone has been stolen, and in other cases tell the bank about thefts even where criminals have not entered the Starling app. She said those reports show the issue is one the bank’s customers could face.

The bank’s approach reflects a broader tension in digital finance: lenders and payment firms are trying to preserve fast access for legitimate users while adding friction when risk signals rise. In this case, the trigger is not a transaction pattern or a suspicious login location, but a physical event inferred from how the handset moves.

Starling has not disclosed technical thresholds for the detector or any figures on expected reductions in attempted app access after theft. The bank’s confirmed process is that a suspected snatch freezes the app and requires the user to pass one of the stated identity checks before using it again.

This story draws on original reporting from Finextra Research.