Mem Place
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How can we use our physical environment to improve our recollection of the things that are important to us?

  • Goals: Create a tool to improve recall of things
  • Team: Self directed
  • Notable Tools: Unity, C#

Memplace is an iPhone app for leaving short notes around your space based on the “Memory Palace Technique”. The app lets you spatially organize things to help jog your memory later.

What was I thinking again?

For consistent note takers it’s easier to write notes than it is to find them again. Long list views in apps or cluttered bookmarks in a notebook are common place, but not alway ideal. Not being able to remember where you placed something (sometimes ironically our notebooks) can be upsetting.

Through conversations with friends I had the idea to allow people to leave spatial notes for themselves. Instead of scrolling through list views, they could assign colored notes to objects and places that already carry meaning.

Note Interaction

I realized that allowing people to quickly move between making, moving and editing notes in world space would be important.

An early prototype that experimented with moving panels between screen and world space. Through testing it was apparent this pattern was too overwhelming to use as a way to select/move between sections. Other previous experiments around XR concepts included an app that let you visualize live USGS earthquake data).

Drawing from a UI approach outlined by Martin Schubert and Barrett Fox, I opted for a “tether” interaction to tie quick 2D controls and interactions to notes existing in 3D space. For Mem Place, controls for notes in space could always be within reach.

Memplace banner
Iteration on designs for the reticle, accessible colors, and markers. Through testing I realized showing more text on a marker (instead of just the first word) was helpful. Because of this I moved forward with the most basic rectangle design for a marker.

This went through a number of permutations, starting with a toggle that could push out and recall notes.

The first version of Mem Place bringing sticky notes into full view during editing, emphasizing focused writing.

I later moved onto a carousel pattern which provided more spatial context while editing and avoided unnecessary worldspace rotation bugs. I also gave the tethers a curve to communicate depth and take up less visual space.

Viewing reminders set along a favorite path for walks

Testing revealed challenges around instruction. The concept itself of saving a location was foreign to people and walking people through the process of scanning their surroundings was crucial. To do this I mapped the worldmapping state to two simplified actions and one confirmation upon saving the space.

Feedback state of AR World Mapping

From there, I added a feature which showed a persistent screenshot of the last location saved. This provided both immediate feedback upon saving and a visual for picking up where they left off when opening the app again.

On the code side, it took awhile to wrestle with ARFoundation, world tracking states and performance. Looking back, native Swift may have (or may not have) been a more sustainable route.

Setting, marking the color of and positioning a note in Mem Place
Memplace banner

Mem Place is currently in version 2.5. I’m looking for feedback! Download the app for iOS or checkout the micro site.