Comparison

Project Des Moines vs Project Meridian

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Project Des Moines

Explore the rich history of Des Moines through an interactive, GPS-enabled map. Discover details about significant people, places, and events, enhanced with archival images and historical publications. This educational tool was created by the Des Moines Public Library.

Highlights
  • Interactive GPS-enabled map
  • Historical information on people, places, events
  • Archival images and publications
  • Location-based historical discovery
  • Developed by Des Moines Public Library
Read full description

Project DSM is a free app that explores the history of Des Moines. Discover information on people, places, and events in Des Moines history. Explore historical information about each site on the interactive GPS-enabled map along with images from archival collections and historical publications. This project was developed by Des Moines Public Library.

About

Project Meridian

Features
Read full description

Project Meridian is an interactive atlas of exploratory ideas. Move through a luminous 3D network, follow related themes, and build your own paths across science, technology, society, and culture. EXPLORE WITH CURIOSITY Browse 1,407 ideas, search text and tags, filter clusters, or take a guided tour. Each idea opens into a readable detail view with its description, themes, and imagined scale and epoch. MAKE YOUR OWN CONNECTIONS Enter a question or theme in Navigator to find related ideas using local text and tag matching. Inspect connections, compare possible paths, and arrange a journey through the atlas. KEEP WHAT INTERESTS YOU Capture idea notes, save journeys on your device, and return to a path later. The atlas and local notebook work offline, with no account required. External background-reading links require an internet connection. READ WITH CONTEXT This is an educational research preview containing speculative proposals. Connections indicate navigational similarity, not causal relationships or scientific verification. Epochs and scales describe imagined settings, not predictions or validated readiness. Selected ideas include background sources with explicit limits on what they support. Designed for curious readers, educators, researchers, artists, and builders. By DMS.

Screenshots

Project Des Moines4 screens
Project Meridian4 screens

Verdict

The call

The clearest difference is update cadence: Project Meridian at weekly against Project Des Moines's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Project Des Moines ships an update every 5 months, Project Meridian weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 8 level
Project Des Moines versus Project Meridian: the parameters behind the verdict, then further details
ParameterProject Des MoinesProject Meridian
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better17.0
Further details — not scored
Size23 MB16 MB
Age rating4+4+
DeveloperCuratescapeMengjie Fan

In-app purchases

None

Project Des Moines

No in-app purchases

None

Project Meridian

No in-app purchases

Questions

Is Project Des Moines free?
Project Des Moines is free to download, with no in-app purchases.
Is Project Meridian free?
Project Meridian is free to download, with no in-app purchases.
Do Project Des Moines or Project Meridian have ads?
Neither Project Des Moines nor Project Meridian shows ads.
Which is updated more often, Project Des Moines or Project Meridian?
Project Des Moines ships an update every 5 months, and Project Meridian weekly. Most recently, Project Des Moines was updated on November 3, 2026 and Project Meridian on October 31, 2026.

Other comparisons