# Birdathon vs 아이플러스S

The clearest difference is review sentiment: Birdathon at 100% against 아이플러스S's 20%. 아이플러스S's advantage is in-app purchases (none vs 4) and update cadence (every 11 days vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

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

Birdathon ships an update every 4 months, 아이플러스S every 11 days. The most recent releases landed on September 19, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | Birdathon | 아이플러스S |
| --- | --- | --- |
| 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** | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 11 days** |
| Monetization | Free | Free |
| Size | 192 MB | 42 MB |
| Requires iOS | 16.1 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Barry Langdon-Lassagne](https://appshunter.io/developer/730758814) | [Userinsight Co., LTD.](https://appshunter.io/developer/573147316) |

## 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 |


### 아이플러스S

[App page](https://appshunter.io/ios/app/s/id1637394822)

This service provides notifications for children's daycare or kindergarten commutes. It ensures parents are informed about their child's arrival and departure from educational facilities.

**Highlights:** Daycare commute notifications, Kindergarten commute notifications, Parental information service, Child arrival alerts, Child departure alerts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Birdathon free?

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

### Is 아이플러스S free?

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

### Do Birdathon or 아이플러스S have ads?

Neither Birdathon nor 아이플러스S shows ads.

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

Birdathon ships an update every 4 months, and 아이플러스S every 11 days. Most recently, Birdathon was updated on September 19, 2026 and 아이플러스S on August 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.*