RxLens
Lens power & PD estimates
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Estimate the sphere power of glasses you already own, and measure your pupillary distance — a quick reference before you buy readers or reorder online.
RxLens helps you read the numbers off glasses you already own — so you can reorder, buy a matching cheap pair, or check a lens before you shop.
Two tools, both on-device:
READ LENS POWER
Photograph your glasses over a dot grid and RxLens estimates the sphere power (e.g. -1.25 or +2.00) of a single-vision lens. Print the built-in target, or use graph paper or an on-screen grid — the reading is a ratio, so any regular pattern works. Auto mode reads the lens when you tap it; Manual mode lets you place the points yourself. Measure each eye separately, take three readings for a tighter average, and calibrate against a lens you already know for best results.
MEASURE YOUR PD
Your pupillary distance — the gap between your pupils in millimetres — is measured directly with the TrueDepth camera. It's the number almost every online glasses order asks for, and you get left, right, and total.
SAVE & SHARE
Keep a labelled record of each pair with a photo, and copy or share a reading with your optician or into a shopping cart.
PRIVATE BY DESIGN
No account, no sign-up, no analytics, no network calls. Every measurement and photo stays on your iPhone.
WHAT IT'S FOR — AND WHAT IT ISN'T
RxLens works best on readers and simple single-vision lenses. It does not read astigmatism (cylinder/axis), progressives, or bifocals, and it is not an eye exam. All results are estimates for buying reference only — RxLens is not a medical device. Confirm anything important with an optician.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Fredy Soussou, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Fredy Soussou
- Size
- 1.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Fredy Soussou