Comparison

Birdathon vs Cahier

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Birdathon

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
Read full description

Birdathon is an observation-centric tool for creating birding checklists. It helps you organize your checklists and share them with others. Use Birdathon in the field to quickly record whether and where a bird is seen or heard and the number observed. The time and location of each observation is automatically recorded. You can adjust the location, time entries and the count of birds observed at any time to ensure your records are accurate. You can add breeding codes to your observations. Checklist maps display the locations of your observations. You can overlay county boundaries for every US state. You can add a range circle such as a 5MR (5-mile Radius) to your maps. You can import and overlay custom kml/kmz files onto your maps. An Overview feature lets you see your combined observations for any time period, and displays a map showing any boundaries you have selected, so you can utilize the map feature even when you are not actively checklisting. You can export Overview data into a csv text file or create a new checklist template from the Overview. Your checklists can be viewed in taxonomic order, alphabetically, by rarity or as a timeline of species. You can enrich your checklist with field notes and add observations such as mammals, butterflies, wildflowers, etc., to make it a more complete record of your experience. You can organize your checklists into categories such as Day List, Year List, County List, Life List, etc., and assign color themes to your lists. Bird species may be added and deleted from your lists at any time. You can create new checklist templates from your previous lists or import templates created by others. You can change which template is being used. You can import text files into Birdathon, making them into templates or new checklists. Different export options for your checklists allow you to import into eBird or another copy of Birdathon. The bird species source data and other resources used in this app come from the following sources: AviList, a unified global checklist of birds, is the core data set used for Birdathon. https://www.avilist.org. Some data has been integrated from the following sources: The eBird/Clements checklist of birds of the world (https://www.birds.cornell.edu/clementschecklist/download/), the American Ornithological Society's (AOS) Checklist of North and Middle American Birds (https://checklist.americanornithology.org), and the American Birding Association's (ABA) checklist of North American Birds (https://www.aba.org/listing-taxonomy/) Alpha codes come from The Institute for Bird Populations’ Standardized 4- and 6-letter Bird Species Codes. https://www.birdpop.org/pages/birdSpeciesCodes.php. County boundary data is from the United States Geological Survey (USGS) TIGER/Line 2019 Shapefiles found on the United States Census Bureau's website at https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.2019.html. Boundaries should be used as general guidelines and not be considered precise. Note especially where county boundaries follow creeks, rivers, ridge lines and other natural features, and so are of much finer resolution than can be shown on Birdathon’s maps. California breeding bird atlas blocks come from the California Bird Atlas, https://www.californiabirdatlas.org. California Bird Atlas logo and breeding code descriptions used with permission.

About

Cahier

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
Read full description

Enseignant ou professeur, jour après jour, vous pourrez avec cette application entrer les activités de votre classe. L'application gère les activités redondantes, qu'elles soient journalières, hebdomadaires, ou bimensuelles.  Nul besoin de faire un planning complexe, vous entrez les données du jour uniquement en indiquant si il y a redondance ou non, l'application s'occupe du reste. Vous pourrez générer des documents PDF pour chaque jour, chaque semaine ou chaque mois, et exporter vos données dans un fichier CSV pour traiter vos données avec un tableur.

Screenshots

Birdathon4 screens
Cahier4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Birdathon versus Cahier: the parameters behind the verdict, then further details
ParameterBirdathonCahier
PriceFree — better$3.99
Rating4.7 (15 ratings) — better—
Positive reviews100.0% of reviews — better37.5% of reviews
Number of ratings15 — better—
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.115.6 — better
Further details — not scored
Size192 MB8 MB
Age rating4+4+
DeveloperBarry Langdon-LassagneCROMBEZ Emmanuel

Customer experience

Birdathon

All ratings15 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cahier

Written reviews8 reviews
Positive37.5%
Neutral37.5%
Negative25.0%

In-app purchases

4 purchases

Birdathon

One-time4
  • Good Tip$0.99
  • Great Tip$1.99
  • Amazing Tip$2.99
Show 1 more
  • Incredible Tip$4.99
None

Cahier

No in-app purchases

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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