Jeff Maynard

Tap a role below for more

Author and writer

A dozen technical books and countless articles.

App developer

Twenty apps for Apple, Amazon and Android.

Police volunteer

Working with Thames Valley Police and the Met.

Long term entrepreneur

Jeff has been a founder and chairman of a number of public and private companies.

The complete leisure guide

River Thames Guide

River Thames Guide, developed by Jeff Maynard, is the official British Marine app and the complete guide to leisure on the River Thames (tidal and non-tidal) and the Wey Navigation.

iOS Shortcuts for river users and others

River Conditions

Have Siri speak the current conditions for any stretch of the non-tidal Thames.


Get today's weather, sunrise and sunset times, wind predictions and more.

Easy to install

Visit the download site (from your iOS device) and select the shortcut(s) to install.

Free and easy to use

follow the Apple instructions after downloading; to run teh shortcut single tap is all you need

River Thames Guide

The guide includes an interactive map, journey planner, help and guidance, lock info, current river conditions and much more; the app is available for iOS (iPad, iPhone, iPod), MacOS, Android and Amazon Fire; Windows users can have all the app functionality via a web site.

Being a Police Volunteer

Provide Support

Police volunteers provide a range of support functions (depending on individual skills and expertise).

Behind the scenes

Jeff is accredited by Thames Valley, Surrey and Sussex Police forces as a Fraud and Cyber Crime Prevention Specialist.

Want to know more?

Read what it takes to be a police volunteer .