Guide each response
See the next Chaplan reference force and target paw, record O/X responses, and move through animals in a round-robin workflow.
iPhone app for laboratory research
A focused workflow for von Frey testing.
Von Frey helps trained research personnel guide concurrent bilateral testing, preserve response history, and export analysis-ready CSV files—all on the device.
Developed by Yamen Abbas
Designed for the bench
Keep the testing workflow clear.
Recover and review
Resume interrupted work, undo the latest response, and review an auditable response history.
Export locally
Create CSV exports on the device and share them only when an operator explicitly chooses a destination.
Privacy by design
Research data stays under the operator’s control.
Von Frey has no accounts, advertising, analytics, tracking, third-party SDKs, or network service. Session state and exports are stored locally. You control file sharing; iOS backups may also include app data according to your device settings.
For preclinical research use
New sessions use the Chaplan 1994 rat reference series, starting at 2.00 g with δ = 0.224. Match calibrated filaments to your approved protocol. Assigned range limits are labeled separately from calculated thresholds. Read the source study.
Von Frey is intended for trained laboratory personnel conducting institutionally approved preclinical studies. It does not diagnose, treat, or provide guidance for humans. Operators remain responsible for following their approved protocol and applicable animal-welfare requirements.