FRANKLIN’S SECRET CITY: The Interactive SmartPhone App - NOW CLOSED

09 Jun 2021

This app has been closed as of September 22, 2021. Thank you to all who joined us in our first (but not last!) foray into interactive digital media. Please check back on our blog and website for future updates on new apps and adventures.

You are invited to the Open Beta of FRANKLIN’S SECRET CITY: A smartphone App-Adventure for two players aged 10-100

June 8-September 22, 2021

You and your partner are the newest recruits to The New Promethean Society, a secret society created to protect some of Benjamin Franklin’s more clandestine - and dangerous - discoveries.  Your task: check out some odd spikes in bioether, a mysterious force that Franklin discovered back in the 1780s, a force that runs through everything and seems to hold the key to a number of strange powers over space and time.  It’s probably nothing -- but sometimes these missions, to make sure bioether doesn’t fall into the wrong hands, can lead you down a twisting path of puzzles and oddities embedded in Philadelphia’s historical relics, as the Society confronts shadowy forces seeking to use bioether for their own ends. 


System Requirements:

BOTH players need a smartphone to play. You can use an iPhone 6S of newer, running iOS or higher or an Android phone running Android 8.0 or later. Both phones need to have active cell service.


You need about 500 MB of space free on your phone for the app to load correctly.


And you both need headphones.


When and Where to Go: 

Daylight hours, starting at Signer’s Garden, Southeast corner of 5th and Chestnut, Philadelphia.


How to get the app:

Click on this link to sign up. or copy this address into your browser:

Once you fill out the form, you will be able to download the user's manual and get instructions on how to get the app. 


**Open the app at home first!**


If you have submitted the form and have not received email instructions within 5 minutes, please check your spam folder. If the instructions are not in your spam folder, please email


After the adventure, please fill out this survey!


This project was made possible by

The Independence Foundation; the Library Company; and a generous donation from lead donors Jean and Marc Machiz.  



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