OpenLitterMap vs Gradescope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenLitterMap
Contribute to a global database of litter and plastic pollution by taking photos and tagging them. The interactive map visualizes pollution data, allowing users to create custom tags and see live updates. Participate in a worldwide competition to collect the most data.
- Interactive global litter map
- Photo tagging of pollution
- Customizable tag creation
- Live map updates
- Open source data
- Country-based data collection competition
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OpenLitterMap is an open source, interactive, and accessible database of the world's litter and plastic pollution. Just take a photo and tag it with our app. Litter is the first application of this real-time data collection platform. For the last 8+ years we have been crowdsourcing data to help train the OpenLitterAI to help with detection and classification. You can extend our pre-defined list of tags with your own custom tags. Just type in whatever you want and press enter. Keep the global map open to see live updates. If you click on a notification, you will be zoomed to the data that was just recorded. Copy the URL to get a link that can send anyone to any photo. Our code & data is open and accessible. Anyone can download our data for free, and use it for any purpose. This is necessary to bring transparency and democracy to science on pollution. As you tag litter, you help your country compete at the #LitterWorldCup to see who can collect the most data. By default, all users are anonymous. However, you can make your name or username appear on the map or leaderboards and compete for a position. You can also add your social media links which will appear on each upload. Like getting upvoted, the more data you upload means the more visibility you will get! Follow us on social media to keep up to date with all of the latest updates and developments.
Gradescope
Easily upload assignments for courses using this app. Submit files from your device or scan your work directly. Assign pages for variable-length assignments and resubmit if needed before the deadline.
- Upload assignments
- Scan documents with camera
- Select existing files
- Assign pages for variable-length assignments
- Resubmit assignments
- View submitted and graded assignments
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Students, upload your assignments to Gradescope more easily than ever before! If your instructor uses Gradescope for your assignments, you can now upload your submission with our mobile app. After installing and opening the app, login to see your Gradescope courses and assignments. To upload a submission, click on the assignment in the “Not Submitted” tab and either “Select File” to select an existing file from your device or “Scan” all pages of your completed work using your iPhone’s camera. Once you submit your file(s), for templated assignments, you’re all set. For variable-length assignments, “Assign pages” to indicate where your answer for each question appears within your submission. It’s that easy! After confirming, your assignment then moves to the “Submitted” tab. If needed, you can resubmit your assignment until the due date your instructor set has passed. Once it is graded and grades are published for the assignment, it then moves to the “Graded” tab. Note: For V1 of the app, you will be directed to our mobile website for any advanced functionality, including viewing feedback and submitting timed, programming, or online assignments. Stay tuned for future updates that will allow you to do even more with our mobile app!
Screenshots
Verdict
The clearest difference is review sentiment: OpenLitterMap at 83% against Gradescope's 9%. OpenLitterMap also leads on rating (3.6 vs 1.4) and update cadence (every 3 weeks vs every 2 months). Gradescope's advantage is ads (none vs shown) and ratings volume (275 vs 9). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OpenLitterMap holds the better App Store score, 3.6 against 1.4. That said, the two scores are not equally well evidenced: Gradescope has 275 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 83% of OpenLitterMap's written reviews are positive against 9% of Gradescope's.
OpenLitterMap ships an update every 3 weeks, Gradescope every 2 months. Both last shipped on November 3, 2026.
| Parameter | OpenLitterMap | Gradescope |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (9 ratings) — better | 1.4 (275 ratings) |
| Positive reviews | 83.3% of reviews — better | 8.7% of reviews |
| Number of ratings | 9 | 275 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 47 MB | 37 MB |
| Age rating | 12+ | 4+ |
| Developer | Sean Lynch | Turnitin |
Customer experience
OpenLitterMap
Gradescope
Bugs and requests
OpenLitterMap
Not enough reviews yet to summarise bugs or requests.
Gradescope
Reported bugs
3 issues- Camera flash issues during scanning
- Photos not uploading in correct order
- Inconsistent download button behavior
Requested features
3 requests- Ability to sort assignments by due date
- Integration of tools for instructors
- Improved iPad and tablet optimization
In-app purchases
OpenLitterMap
No in-app purchases
Gradescope
No in-app purchases









