Lens Calc Downloads & RevenueLens Calc - Optical Dispensing · App Store
Lens Calc - Optical Dispensing is #193 in Medical Paid in Australia and charting in 1 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperOptical Directions Consulting
CategoryMedical
Price1.99 GBP
Released
Rating★ 3.0 (1)
Version2.5
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026Lens Calc - Optical Dispensing update history & changes
Last change · 5 events since 5 Mar 2010Full timeline ↓📈Entered the top 100📈Charting in a new country🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 4 events in the last 12 months
- 📈Lens Calc - Optical Dispensing entered the top 100Top Paid · Medical · GB
- 📈Lens Calc - Optical Dispensing charting in a new countryUnited Kingdom
- 🆕Lens Calc - Optical Dispensing first spotted by AppInsider#83 in Top Paid · Medical · Australia
- 🆕Lens Calc - Optical Dispensing released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
3.0 ★
1 ratings
Measured
Best rank now
#193
Medical PaidMeasured
Lens Calc - Optical Dispensing on the App Store
App details
App ID
359616750
Publisher
Rob McQualter
On the store since
Mar 2010
16 years on the store
Minimum OS
iOS 12.0+
iPhone 5s and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
9 MB
Also listed in
Utilities
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Australia | MedicalPaid | #193 |
Apps near Lens Calc - Optical Dispensing on the chart
Medical Paid, around #193.
Ratings
App Store, worldwide.
Rating
3.0 ★
1 ratings
Measured
Ratings
1
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Medical apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Lens Calc - Optical Dispensing
LensCalc: The six most important calculations for all optical retail assistants, optical dispensers or dispensing optician. Oh, and optometrists might benefit too. LensCalc includes Vertex Distance, Effective Diameter, Lensmeter Helper, Transposition, Lens Thickness Estimation and Induced Prism, in a quick & easy to use format. It also includes a progressive lens markup helper!
Vertex Distance: Enter the lens power & two vertex distances. LensCalc will give you the new power required, and tell you if the difference is significant.
Effective Diameter: Enter the Frame PD, Widest Diameter & Patient's PD. LensCalc tells you the required blank lens diameter.
Vertometer / Lensmeter Helper: Enter the two powers and the axis of the second power. LensCalc gives you the proper minus cyl form. Because sometimes those plusses and minuses are just a bit too confusing!
Transposition: Enter the lens power in plus cyl form, and LensCalc will give you the minus cyl form. Useful when you've got to deal with those dinosaur Rxs. Or, if you are a dinosaur, convert those new-fangled minus cyl prescriptions into that old favourite, plus cyls.
Induced Prism: Enter the power, decentration and direction of decentration. LensCalc tells you how much prism and the base direction. It'll also tell you the effective power of the lens in that direction, to aid with dispensing advice.
Lens Thickness: Enter power, centre/edge thickness, lens diameter and refractive index. LensCalc tells you the resulting edge or centre thickness.
So, they're all there: the six most common calculations, and designed for speed and ease of use. What an excellent idea.
Multifocal markup: Place your marked-up lens on the iPhone screen, drag the top, bottom & centre markers to the appropriate place and LensCalc tells you the optical centre height, the frame depth and the datum measurement. Use it when fitting or when checking jobs!
Vertex Distance: Enter the lens power & two vertex distances. LensCalc will give you the new power required, and tell you if the difference is significant.
Effective Diameter: Enter the Frame PD, Widest Diameter & Patient's PD. LensCalc tells you the required blank lens diameter.
Vertometer / Lensmeter Helper: Enter the two powers and the axis of the second power. LensCalc gives you the proper minus cyl form. Because sometimes those plusses and minuses are just a bit too confusing!
Transposition: Enter the lens power in plus cyl form, and LensCalc will give you the minus cyl form. Useful when you've got to deal with those dinosaur Rxs. Or, if you are a dinosaur, convert those new-fangled minus cyl prescriptions into that old favourite, plus cyls.
Induced Prism: Enter the power, decentration and direction of decentration. LensCalc tells you how much prism and the base direction. It'll also tell you the effective power of the lens in that direction, to aid with dispensing advice.
Lens Thickness: Enter power, centre/edge thickness, lens diameter and refractive index. LensCalc tells you the resulting edge or centre thickness.
So, they're all there: the six most common calculations, and designed for speed and ease of use. What an excellent idea.
Multifocal markup: Place your marked-up lens on the iPhone screen, drag the top, bottom & centre markers to the appropriate place and LensCalc tells you the optical centre height, the frame depth and the datum measurement. Use it when fitting or when checking jobs!
Latest updates
2.5
Bug fix for effective diameter screen.
