# Birdathon vs Cahier

The clearest difference is review sentiment: Birdathon at 100% against Cahier's 38%. Birdathon also leads on price (Free vs $3.99). Cahier's advantage is in-app purchases (none vs 4) and device support (4 vs 2). On update cadence, ads and iOS requirement there is nothing between them.

Birdathon is free to download; Cahier costs $3.99 up front. Birdathon sells 4 one-off in-app purchases. Cahier asks for nothing beyond the download.

Birdathon ships an update every 4 months, Cahier every 2 months. The most recent releases landed on September 19, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Birdathon | Cahier |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.7 (15 ratings)](https://appshunter.io/ios/app/birdathon/id1211977440/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | **100.0% of reviews** | 37.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 192 MB | 8 MB |
| Requires iOS | 16.1 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Barry Langdon-Lassagne](https://appshunter.io/developer/730758814) | [CROMBEZ Emmanuel](https://appshunter.io/developer/375656695) |

## 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 |


### Cahier

[App page](https://appshunter.io/ios/app/cahier-journal/id1476948518)

This application helps teachers and professors manage daily class activities. It handles recurring tasks and allows for easy data entry, generating PDF reports and CSV exports for further analysis.

**Highlights:** Manage daily class activities, Handle recurring tasks (daily, weekly, bi-weekly), Simplified data entry, Generate PDF reports (daily, weekly, monthly), Export data to CSV

**In-app purchases:** none


## Frequently asked questions

### Is Birdathon free?

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

### Is Cahier free?

Cahier costs $3.99, with no in-app purchases.

### Do Birdathon or Cahier have ads?

Neither Birdathon nor Cahier shows ads.

### Which is updated more often, Birdathon or Cahier?

Birdathon ships an update every 4 months, and Cahier every 2 months. Most recently, Birdathon was updated on September 19, 2026 and Cahier on August 22, 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.*