Skip to content
Gotomote is handheld OnStep telescope controller app for iOS devices. OnStep is a computerized goto system for stepper motor equipped mounts.
Swift Objective-C C
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.
OnStep 2.sketch

App Store

What's Gotomote?

Gotomote composes two words ’GoTo+Remote’. “GoTo” refers to a type of telescope mount that can automatically point a telescope at astronomical objects that the user selects.

How does it work?

Gotomote app can connect to OnStep over IP. It communicates to a ’Serial Port’ terminal server listening to a TCP socket. Gotomote opens a network connection to a socket and any data app send on the output stream get sent out of the serial port and any data sent to the serial port gets delivered over the input stream associated with the connection.

Features: What does it do?

It’s easy-to-use and built over powerful asynchronous socket. Queued non-blocking reads and writes, with optional timeouts. App has a database of Quasar, Messier and a vast database of Galaxies with a named bright star catalog. Initialization of date/time/location, and align with one, two, or three stars. Align with one-star to quickly get going or two/three stars to correct for polar axis misalignment, cone error, etc. Parking functionality includes the ability to set the park position (anywhere you like), park, and to unpark. The guide are for pulse-guiding, centering objects, etc. Commands for PEC programming and much more.


  • Development credits for Gotomote iOS app obviously goes to me.
  • Design and user interface for the same by my friend Zachary.
  • Howard Dutton and Khalid Baheyeldin for OnStep.
  • Brightest stars database by
  • Messier, Quasar, Galaxy data by astro-organizer.


Satnam Singh,


Gotomote is available under the GNU General Public License v3.0 license. See the LICENSE file for more info.

You can’t perform that action at this time.