# APE Optics Calculator > Laser optics calculations for ultrafast and nonlinear phenomena. (iPhone/iPad app by Stefan Popien.) - Source: https://appshunter.io/ios/app/ape-optics-calculator/id639207733 (this page in markdown: same URL + `.md`) - Developer: [Stefan Popien](https://appshunter.io/developer/639207736) - Category: Education, Utilities - Price: Free - Rating: 4.80/5 from 4 App Store ratings · 4 written reviews indexed - Age rating: 17+ - Requires: iOS 8.0 · 34 MB - Released: 2013-04-26 - Data updated: 2026-06-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/ape-optics-calculator/id639207733/reviews.md ## What is APE Optics Calculator? The APE Calculator helps to easily evaluate often needed equations in ultrafast and nonlinear laser optics. This includes Sum Frequency Generation (SFM, SFG), Difference Frequency Generation (DFG), the wavelength relations in an optical parametric oscillator or amplifier (OPO, OPA) as well as in coherent anti-Stokes Raman scattering (CARS) or SRS spectroscopy. The conversion between wavelength, wavenumber, photon energy and frequency as well as different characterizations of pulses can be calculated, e.g. bandwidth, time bandwidth product, pulse duration or dispersion. Conversion of peak and average powers, pulse energy and pulse energy density, repetition rate and beam diameter as well as power densities is possible. Feedback as well as feature requests are appreciated. ## Key features - Sum/Difference Frequency Generation calculations - Optical Parametric Oscillator/Amplifier calculations - Spectroscopy calculations (CARS, SRS) - Wavelength, wavenumber, photon energy conversion - Pulse characterization (bandwidth, duration, dispersion) - Power and energy conversion ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/ape-optics-calculator/id639207733/reviews.md ### 5/5 — Please upgrade for latest iOS. Much thanks *2021-06-28* Great app👍 ### 5/5 — IOS 14 issue *2021-06-13* Hello, I would like to ask developer to update the calculator to be able to run it on iOS 14. Thank you ### 5/5 — Uber *2021-06-10* Super useful, wish it worked on latest iOS, thanks apple for implementing backwards compatibility… ### 5/5 — Always loved the APE calculator! *2013-10-08* The tools from APE (whether it is the ruler, or the calculator on the website) have always been invaluable for my work and studies. It's great that now can use on it on the go on my iPhone. Thanks for providing this! ## Frequently asked questions about APE Optics Calculator ### What laser optics equations can APE Optics Calculator solve? APE Optics Calculator can solve equations for Sum Frequency Generation (SFM, SFG), Difference Frequency Generation (DFG), optical parametric oscillators/amplifiers (OPO, OPA), and coherent anti-Stokes Raman scattering (CARS) or SRS spectroscopy. ### Does APE Optics Calculator help with pulse characteristics? Yes, APE Optics Calculator can calculate various pulse characteristics including bandwidth, time bandwidth product, pulse duration, and dispersion. ### Can APE Optics Calculator convert between different power and energy units? Yes, it allows conversion between peak and average powers, pulse energy and pulse energy density, repetition rate, beam diameter, and power densities. ### What devices is APE Optics Calculator available on? APE Optics Calculator is available on iPhone, iPad, and iPod devices. ### How often is APE Optics Calculator updated? The latest version, 2.0.2, was released on March 22, 2022. The app was initially released on April 26, 2013. ### What is the age rating for APE Optics Calculator? APE Optics Calculator has an age rating of 17+, indicating it is intended for mature users. ### Does APE Optics Calculator have ads? No, APE Optics Calculator does not contain advertisements. ### What is the user sentiment for APE Optics Calculator? Based on the available data, APE Optics Calculator has a very high rating of 4.8 stars from 4 ratings, suggesting positive user sentiment. ## Version history (last 4 releases) ### 2.0.2 — 2022-03-22 - complete redesign with side menu - light and dark themes (follows system theme) - pin your favorite calculations to the home page - view news on the home page - share calculation results - all calculations now have an explanatory text - save your preferred units and outputs per calculation - wavelength conversion now shows color for visible light - photon energy (eV) has been added to most calculations - propagation of light now includes refractive index and resonator repetition rate ### 2.0.1 — 2022-03-21 - complete redesign with side menu - light and dark themes (follows system theme) - pin your favorite calculations to the home page - view news on the home page - share calculation results - all calculations now have an explanatory text - save your preferred units and outputs per calculation - wavelength conversion now shows color for visible light - photon energy (eV) has been added to most calculations - propagation of light now includes refractive index and resonator repetition rate ### 1.0.1 — 2014-06-29 For certain combinations of physically impossible input values the OPO calculation did not complain but produce an also impossible output value. This is now fixed. The app now also uses the iOS 7 style on iOS 7 devices. ### 1.0.0 — 2013-04-26 No release notes. ## Apps similar to APE Optics Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [iPhasematch](https://appshunter.io/ios/app/iphasematch/id492370060) | 5.0 (2) | Free | Education | ## Related topics [wavelengthenergycalc](https://appshunter.io/ios/topics/wavelengthenergycalc) · [wavelength optics calculator](https://appshunter.io/ios/topics/wavelength-optics-calculator) · [optics](https://appshunter.io/ios/topics/optics) --- *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 2026-06-08.*