# Leave No Trace Citizen Science vs Lion Roaring

The clearest difference is update cadence: Lion Roaring at weekly against Leave No Trace Citizen Science's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

Leave No Trace Citizen Science ships an update every 6 weeks, Lion Roaring weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Leave No Trace Citizen Science | Lion Roaring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/leave-no-trace-citizen-science/id1536428995/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 33 MB | 88 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Greg Newman](https://appshunter.io/developer/1536428997) | [Daud Santosa](https://appshunter.io/developer/1808433215) |

## What reviewers say

### 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


### Lion Roaring

[App page](https://appshunter.io/ios/app/lion-roaring/id6744611368)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Leave No Trace Citizen Science free?

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

### Is Lion Roaring free?

Lion Roaring is free to download, with no in-app purchases.

### Do Leave No Trace Citizen Science or Lion Roaring have ads?

Neither Leave No Trace Citizen Science nor Lion Roaring shows ads.

### Which is updated more often, Leave No Trace Citizen Science or Lion Roaring?

Leave No Trace Citizen Science ships an update every 6 weeks, and Lion Roaring weekly. Most recently, Leave No Trace Citizen Science was updated on October 24, 2026 and Lion Roaring on October 25, 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.*