# Birdathon vs 逆行加油站

The clearest difference is in-app purchases: 逆行加油站 at none against Birdathon's 4. 逆行加油站 also leads on update cadence (every 2 weeks vs every 4 months). Birdathon's advantage is iOS requirement (16.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Birdathon sells 4 one-off in-app purchases. 逆行加油站 asks for nothing beyond the download.

Birdathon ships an update every 4 months, 逆行加油站 every 2 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | Birdathon | 逆行加油站 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (15 ratings)](https://appshunter.io/ios/app/birdathon/id1211977440/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 192 MB | 63 MB |
| Requires iOS | **16.1** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Barry Langdon-Lassagne](https://appshunter.io/developer/730758814) | [Chongqing Deao Education Investment Co., Ltd.](https://appshunter.io/developer/1530482073) |

## What reviewers say

### Birdathon

[App page](https://appshunter.io/ios/app/birdathon/id1211977440)

This app helps birdwatchers create and organize detailed checklists of their observations. It automatically records time and location, allowing for easy editing and customization. Users can visualize their sightings on maps, add field notes, and export data for sharing or further analysis.

**Highlights:** Observation-centric checklists, Automatic time and location recording, Customizable maps with boundary overlays, Field notes for additional observations, Multiple checklist sorting options, Data export to CSV and other formats, Create checklist templates

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Good Tip | $0.99 | one-time |
| Great Tip | $1.99 | one-time |
| Amazing Tip | $2.99 | one-time |
| Incredible Tip | $4.99 | one-time |


### 逆行加油站

[App page](https://appshunter.io/ios/app/id1528652907)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Birdathon free?

Birdathon is free to download, with in-app purchases available.

### Is 逆行加油站 free?

逆行加油站 is free to download, with no in-app purchases.

### Do Birdathon or 逆行加油站 have ads?

Neither Birdathon nor 逆行加油站 shows ads.

### Which is updated more often, Birdathon or 逆行加油站?

Birdathon ships an update every 4 months, and 逆行加油站 every 2 weeks. Most recently, Birdathon was updated on October 29, 2026 and 逆行加油站 on October 29, 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.*