SmartLaunch is a rocket launch simulation app that gives on-the-spot information about the initial moments of a planned launch. Specifically, given a few details about the rocket and the motor, it will give the speed at which the rocket will leave the launch guide, the angle of attack of the rocket with any crosswind, as well as the thrust-weight ratio based on the initial thrust of the motor (not the average thrust). Using this information, the rocketeer can judge whether a specified motor may result in a stable flight under the given conditions.
The app also gives the expected apogee altitude and coast time for the proposed flight.

Version 1 features:

User specified units (metric, standard)
Set launch angle by tilting the device, either up against launch guide or by camera view
Set launch site altitude by GPS (if available and Location Services allowed)
Database of over 800 commercial rocket motor thrust curves
Remembers multiple rockets and easily switches back and forth
User can decide which motors they want to see in the list - by diameter, impulse class or manufacturer

What’s New

Version 2.31

Fixed a little interface glitch.
Working on a major interface update for all size devices soon.
Added the latest updates I have for commercial motors.
If you do not find the motor you are looking for please drop me a line and I will see what I can do.

Ratings and Reviews

IronManMrk41 ,

Great app just one gripe with it

I love this app and is fairly accurate to what I’ve experienced with my launches. However I don’t have an altimeter to measure actual heights so the Cd value is likely off a bit. My only gripe with the app is the lack of certain rocket motors, namely the f15’s from estes that I use regularly. I’ve put in a f26 as a placeholder but would like to see a preprogrammed f15 or an option to put in your own engine parameters

stormnorman57 ,

Smart app

Very impressed with the physics programmed into this tool. Gave it a 4 out of 5 because an F-15 Estes engine was not listed.

The Original Shane ,

Very Good Portable Rocket Predictions

This is a great program for quickly getting an idea of what a given rocket weight/diameter/cd and motor combination will yield, regarding apogee altitude, speeds, etc.

I can do single engines, as well as clustered engines. It does not do multi-stage, however ( I sure wish it would!). Also, there is no descent/parachute calculation.

Once your rocket has flown, you can enter the altitude and engine it flew to/with, and it will calculate and new Cd. If you then save this Cd, it will be used in all further calculations for other motors you might try.

This application is great for standing in the rocket vendor's trailer on launch day and determining the flight characteristics of the available motors the vendor has for sale.

It's not as full-featured as RockSim, but you probably aren't going to be designing a rocket on launch day, are you?

4 Stars as is, but would be 5 Stars with staging predictions.


Howard SMART
28.3 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2012-2017 J. Howard Smart


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like