Red & near-infrared light therapy
The only handheld RLT device with per-unit NIST-traceable calibration
Designed and calibrated in California using NIST-traceable optical instrumentation
Most devices specify electrical power. Rejuvulite specifies delivered optical dose — individually measured on your unit, before it ships. This converts the device from a timer into a dose-delivery instrument. Typical session doses fall within commonly studied photobiomodulation ranges (10–20 J/cm²).
Who this is for right now
Technically curious users and practitioners
The current evaluator program is suited to users who want to understand their treatment parameters, track session consistency, and work with a device that provides measured rather than estimated output. Clinical practitioners, researchers, and engineers evaluating photobiomodulation hardware are a natural fit.
For general consumers
A consumer release follows the evaluator phase
If you’re looking for a device to buy today without a structured feedback commitment, joining the waitlist is the right step — you’ll be notified when general availability opens following the evaluator program.
typical operating point
typical operating point
near-contact geometry
to 10–20 J/cm²
Why dose control matters
Why it’s different
Individual unit calibration
Every unit is measured with a Thorlabs PM100D / S121C before shipment. You receive the actual irradiance of your device, not a nominal specification shared across a production run.
Optical contact sensing
An ambient-nulling reflected optical measurement confirms consistent placement throughout each session. Contact quality is logged with every session — not inferred after the fact.
NFC session telemetry
Session data is stored on the device via NFC tag. No background connectivity, no account required. A companion iOS app visualizes session history and contact quality over time.
Joule-based dose delivery
Select a target dose in joules. The app calculates session time from your unit’s calibrated irradiance and stops when that dose has been delivered — not a nominal estimate based on LED specifications.
Companion app
Session telemetry,
on your phone
The Rejuv app retrieves session data from the device via a simple NFC tap. No background connectivity or account required.
- Select a target dose in joules — session runs until that dose is delivered against your unit’s calibrated irradiance
- Dynamic Optical Response chart — real-time view of contact stability throughout each session
- Session history with mode, duration, dose delivered, and contact quality per session
- Calendar view of usage patterns across time
- Available via TestFlight for early-access participants
Dynamic Optical Response
Session calendar
Per-unit calibration record
Your unit’s actual numbers
Each Rejuvulite ships with a calibration record specific to that serial number, measured before shipment. The record shown is from a current production unit — every unit carries its own serial-numbered certificate.
Measurement performed with Thorlabs PM100D / S121C (NIST-traceable), at near-contact geometry after thermal stabilization.
See full measurement methodology →Evaluation units are ready — May 2026
A small number of units are available for participants willing to provide structured feedback on usability and performance. Particularly suited to technically engaged users and practitioners.
Hardware validated · NIST-traceable calibration · No obligation