iOculari - Telescope 4+

Federico Romano'

Designed for iPad

    • 3.3 • 3 Ratings
    • $2.99



iOculari is a "calculator" for all fans of astronomy that I developed as a hobby and leisure. Inputting a few data, as well as enabling you to check the quality of the configuration of your telescope, will also provide useful and practical tips for choosing the perfect eyepice, in a simple and understandable way.

It also provides several parameters on the performance of your equipment including:
exit pupil,
true field,
transit time,
theoretical resolution,
many other curiosities.

The more detailed descriptions of various items are meant to be an introduction for beginners and a reminder for the experts.

You can save the data of your telescopes, your eyepieces and the observers for an easy and faster consultation.

Do you want to translate iOculari in your language? Send me an email!

Remember that buying this App it's also a nice way to support all the works and free applications you find on ;)

What’s New

Version 3.61

Bug fix
Code cleanup

Ratings and Reviews

3.3 out of 5
3 Ratings

3 Ratings

TonyTeaBags ,

A Very Utilitarian Application

The other reviewers are right; this is not all that intuitive in setup. Clear instructions are needed. However, this is a great app once you learn how to set it up. Spending the time to learn its idiosyncracies is well worth the trouble. All the optical train specifications are presented in one place for any telescope, eyepiece, and astronomer's eye. Very useful either at your desk or at the eyepiece. I recommend this application to anyone who has the patience to learn to use it.

South Star ,

Updated review to 5 stars

I originally gave this app 3 stars, mainly due to it not being completely intuitive to me in the beginning. But I’ve now used the app for a few years, and really feel it deserves 5 stars. With 9 telescopes and dozens of eyepieces (yes, I have a problem), I find the app indispensable during a viewing session. Once you input and save (archive) telescope, eyepiece, and observer details, just choose your scope/eyepiece combination, and the app gives you magnification, field of view, exit pupil, and several other pieces of useful information. The app is very helpful in comparing different combinations of equipment when figuring what you wish to use for observing. Give this app a shot, and you won’t be disappointed.

Israel70 ,

Difficult to use

I am a beginner and was looking for a calculator to help me understand the different eye pieces on my telescope. I was hoping that this app would pull the specs of my telescope and allow me to better understand the various lenses I have. I did not get much out of this app, I hope it gets improved significantly otherwise I would say don’t buy!

App Privacy

The developer, Federico Romano', 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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