# Calflora Observer Pro vs TrashBlitz

The clearest difference is rating: Calflora Observer Pro at 5.0 against TrashBlitz's 4.4. Calflora Observer Pro also leads on review sentiment (100% vs 71%). On price, ratings volume, 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.

Calflora Observer Pro holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 12 respectively. Written reviews point the same way: 100% of Calflora Observer Pro's written reviews are positive against 71% of TrashBlitz's.

Calflora Observer Pro ships an update every 3 months, TrashBlitz every 2 months. The most recent releases landed on September 25, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Calflora Observer Pro | TrashBlitz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/calflora-observer-pro/id1199907272/reviews)** | [4.4 (12 ratings)](https://appshunter.io/ios/app/trashblitz/id6447145347/reviews) |
| Number of ratings | 7 | **12** |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 6 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Calflora Database](https://appshunter.io/developer/605784321) | [The 5 Gyres Institute](https://appshunter.io/developer/1679667267) |

## What reviewers say

### Calflora Observer Pro

[App page](https://appshunter.io/ios/app/calflora-observer-pro/id1199907272)

Record observations of wild plants in California with photos, GPS, and notes. Upload your findings to the Calflora.org website to contribute to botanical data. Essential tips are available within the app.

**Highlights:** Record wild plant observations, Include photos and GPS coordinates, Add notes and other information, Upload data to Calflora.org, Access essential tips within the app

**Features:** macOS Compatibility

**In-app purchases:** none


### TrashBlitz

[App page](https://appshunter.io/ios/app/trashblitz/id6447145347)

This app allows users to log and track the trash they collect from various locations, including national parks, neighborhoods, and cities. It helps users contribute to environmental cleanup efforts by documenting their impact.

**Highlights:** Track trash pickup, Log environmental cleanup efforts, Document trash collection, Support National Park cleanups, Community cleanup tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Calflora Observer Pro free?

Calflora Observer Pro is free to download, with no in-app purchases.

### Is TrashBlitz free?

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

### Which has better reviews, Calflora Observer Pro or TrashBlitz?

Calflora Observer Pro is rated higher. Calflora Observer Pro averages 5.0 out of 5 from 7 ratings, while TrashBlitz averages 4.4 from 12 ratings.

### Do Calflora Observer Pro or TrashBlitz have ads?

Neither Calflora Observer Pro nor TrashBlitz shows ads.

### Which is updated more often, Calflora Observer Pro or TrashBlitz?

Calflora Observer Pro ships an update every 3 months, and TrashBlitz every 2 months. Most recently, Calflora Observer Pro was updated on September 25, 2026 and TrashBlitz on September 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.*