Piazza vs Concorde TSP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Piazza
This platform facilitates communication and learning for higher education. Students can ask and answer questions, while instructors can monitor student engagement. It provides real-time updates and a centralized space for class interactions.
- Ask and answer questions
- Real-time updates
- Centralized class communication
- Student engagement monitoring
- Mobile access for students and instructors
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Piazza is the leading social learning platform for higher education, used by hundreds of thousands of students and more than 15 thousand professors for centralized class communications and polling. If you're a student, the Piazza app lets you ask and answer questions in all your Piazza classes from your mobile device, and updates you in real time when your peers are engaged. If you're an instructor, the app gives you a simple way to check in on your students during those spare moments between meetings. Stay connected to your class with Piazza!
Concorde TSP
This app provides exact optimal solutions for the Traveling Salesman Problem (TSP) on your device. It includes modules for map routing, tour-finding heuristics, and a TSP challenge, all based on established computational mathematics.
- Exact optimal solutions for TSP
- Solves instances of 1,000+ cities
- Local computations on iPhone/iPad
- Includes TSP Art and Map Routing
- Tour-Finding Heuristics
- Minimum Spanning Tree module
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Given a list of cities and the distance to travel between each pair of them, the traveling salesman problem, or TSP for short, asks for the shortest route to visit each city and to return to the starting point. The Concorde App computes exact optimal solutions for TSP, based on the Concorde code by Applegate, Bixby, Chvatal, and Cook. Instances of 1,000 or more cities can often be solved exactly, with all computations carried out locally on your iPhone or iPad. The app is a companion to the book "In Pursuit of the Traveling Salesman: Mathematics at the Limits of Computation", William Cook, Princeton University Press, 2012. Includes Exact TSP Solver, 3D Points, TSP Art, Map Routing, Tour-Finding Heuristics, Cutting Planes , TSP Challenge, Minimum Spanning Tree, and Perfect Matching modules.
Screenshots
Verdict
The clearest difference is review sentiment: Concorde TSP at 76% against Piazza's 14%. Concorde TSP also leads on rating (4.2 vs 2.1) and iOS requirement (13.5 vs 15.6). Piazza's advantage is update cadence (fortnightly vs every 8 months) and ratings volume (277 vs 11). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Concorde TSP holds the better App Store score, 4.2 against 2.1. That said, the two scores are not equally well evidenced: Piazza has 277 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 14% of Piazza's written reviews are positive against 76% of Concorde TSP's.
Piazza ships an update fortnightly, Concorde TSP every 8 months. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.
| Parameter | Piazza | Concorde TSP |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (277 ratings) | 4.2 (11 ratings) — better |
| Positive reviews | 14.3% of reviews | 76.5% of reviews — better |
| Number of ratings | 277 — better | 11 |
| Update frequency | Fortnightly — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 13.5 — better |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Piazza Technologies, Inc. | William Cook |
Customer experience
Piazza
Concorde TSP
Bugs and requests
Piazza
Reported bugs
4 issues- Inability to post or reply
- Randomly logs out users
- Fails to load posts and resources
- Incompatible with newer iOS versions
Requested features
5 requests- Dark mode option
- Ability to access course materials
- Improved formatting and editing tools
- Better organization of posts and discussions
- Seamless integration with web version
Concorde TSP
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Piazza
No in-app purchases
Concorde TSP
No in-app purchases
