# Anecdata.org vs Leave No Trace Citizen Science

The clearest difference is ratings volume: Anecdata.org at 4 against Leave No Trace Citizen Science's 1. Anecdata.org also leads on iOS requirement (13.0 vs 15.0). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Anecdata.org against 5.0 for Leave No Trace Citizen Science. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Anecdata.org ships an update every 3 weeks, Leave No Trace Citizen Science every 6 weeks. The most recent releases landed on July 25, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | Anecdata.org | Leave No Trace Citizen Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/anecdataorg/id1315666791/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/leave-no-trace-citizen-science/id1536428995/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 47 MB | 33 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MDI Biological Laboratory](https://appshunter.io/developer/1210127056) | [Greg Newman](https://appshunter.io/developer/1536428997) |

## What reviewers say

### Anecdata.org

[App page](https://appshunter.io/ios/app/anecdataorg/id1315666791)

This platform empowers users to create, manage, and participate in citizen science projects. It facilitates data collection in the field, even offline, and supports project analysis and download.

**Highlights:** Project creation and management, Datasheet design, Participant invitation, Offline data collection, Data download and analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Leave No Trace Citizen Science

[App page](https://appshunter.io/ios/app/leave-no-trace-citizen-science/id1536428995)

Empower volunteers to monitor outdoor resource conditions over time. This citizen science application supports the mission of protecting natural spaces through responsible enjoyment and education.

**Highlights:** Citizen science data collection, Resource condition monitoring, Outdoor ethics education, Inspires responsible enjoyment, Volunteer empowerment

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Anecdata.org free?

Anecdata.org is free to download, with no in-app purchases.

### Is Leave No Trace Citizen Science free?

Leave No Trace Citizen Science is free to download, with no in-app purchases.

### Which has better reviews, Anecdata.org or Leave No Trace Citizen Science?

Anecdata.org and Leave No Trace Citizen Science are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Anecdata.org or Leave No Trace Citizen Science have ads?

Neither Anecdata.org nor Leave No Trace Citizen Science shows ads.

### Which is updated more often, Anecdata.org or Leave No Trace Citizen Science?

Anecdata.org ships an update every 3 weeks, and Leave No Trace Citizen Science every 6 weeks. Most recently, Anecdata.org was updated on July 25, 2026 and Leave No Trace Citizen Science on August 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*