# Lensometer: Estimate Glasses — Estimate power, cylinder, axis

> Estimate power, cylinder, axis (iPhone/iPad app by My Call Bag LLC.)

- Source: https://appshunter.io/ios/app/lensometer-estimate-glasses/id6758786730 (this page in markdown: same URL + `.md`)
- Developer: [My Call Bag LLC](https://appshunter.io/developer/1243282862)
- Category: Medical, Education
- Price: $49.99
- Age rating: 4+
- Requires: iOS 26.0 · 45 MB
- Languages: American English
- Released: 2026-03-24
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/lensometer-estimate-glasses/id6758786730/reviews.md

## What is Lensometer?

Estimate the power of single vision eyeglass lenses using your phone's camera and an Amsler grid.

Lensometer uses an on-device Core ML model to analyze a photo of an Amsler grid taken through an eyeglass lens and predict the lens prescription — including sphere, cylinder, and axis.

HOW IT WORKS
1. Display an Amsler grid on any screen by visiting AmslerGr.id in a browser, or use a printed Amsler grid.
2. Hold a single vision lens halfway between your phone and the grid.
3. Take a photo through the lens with the grid centered in the square overlay.
4. The app analyzes the image and returns an estimated prescription in seconds.

FEATURES
- AI-powered lens power estimation using a trained Core ML model
- Works with single vision lenses (not bifocals or progressives)
- Supports both positive and negative cylinder notation
- Spherical equivalent calculation
- Prescription history with automatic saving
- Camera overlay guides for grid alignment and lens positioning
- Fully on-device — no internet connection required

IMPORTANT DISCLAIMER
This app is NOT FDA approved and has NOT been validated for clinical use. It does not replace a traditional lensometer or professional eye examination. Results should not be used for clinical decision-making or prescribing eyeglasses. This is an educational tool intended for rough estimation purposes only.


## Version history (last 1 release)

### 1.0 — 2026-03-24

No release notes.

## More apps by My Call Bag LLC

- [Ullman Indirect](https://appshunter.io/ios/app/ullman-indirect/id1243282866)
- [Eye Chart Watch App](https://appshunter.io/ios/app/eye-chart-watch-app/id6468593868)
- [Ophthalmology & Optometry](https://appshunter.io/ios/app/ophthalmology-and-optometry/id6471442410)
- [Scoville Heater Meter](https://appshunter.io/ios/app/scoville-heater-meter/id6473058296)
- [OKN Drum: Optokinetic](https://appshunter.io/ios/app/okn-drum-optokinetic/id6474153180)
- [Amsler Grid: AMD & Retina App](https://appshunter.io/ios/app/amsler-grid-amd-and-retina-app/id6474520987)

All apps by My Call Bag LLC: https://appshunter.io/developer/1243282862

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*