# Vibrant Field Guide vs 오답노트AI

The clearest difference is in-app purchases: Vibrant Field Guide at none against 오답노트AI's 2. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. 오답노트AI sells 2 in-app purchases, starting at $9.99 per month. Vibrant Field Guide asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Vibrant Field Guide | 오답노트AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | **Free** | Freemium |
| Size | 19 MB | 33 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Soo Jeong Min](https://appshunter.io/developer/6775654534) | [2Labs](https://appshunter.io/developer/1089573745) |

## What reviewers say

### Vibrant Field Guide

[App page](https://appshunter.io/ios/app/vibrant-field-guide/id6775654322)

Record plants and animals you encounter and build your personal field guide. Identify species from photos, complete collections, and engage in daily challenges. Connect with friends, form guilds, and compete in rankings.

**Highlights:** Identify species from photos, Build field-guide collections, Complete daily missions, Customize profile, Add friends and create guilds, Climb leaderboards

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

**In-app purchases:** none


### 오답노트AI

[App page](https://appshunter.io/ios/app/ai-ai/id6787683753)

This app uses AI to automatically create personalized study notes and practice tests from your incorrect answers. Simply photograph your mistakes, and the AI will transcribe them, organize them by subject, and generate similar problems for further practice. It also offers an AI tutor for instant help and tracks your progress with weekly reports.

**Highlights:** AI-generated study notes from photos, Automatic organization by subject and unit, Personalized practice tests with similar problems, AI tutor for instant help with questions, Spaced repetition for review, Weekly progress reports, Printable PDF test creation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 오답노트AI Pro 월간 | $9.99 | per month |
| 오답노트AI Pro 연간 | $79.99 | per year |


## Frequently asked questions

### Is Vibrant Field Guide free?

Vibrant Field Guide is free to download, with no in-app purchases.

### Is 오답노트AI free?

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

### Do Vibrant Field Guide or 오답노트AI have ads?

Neither Vibrant Field Guide nor 오답노트AI shows ads.

### Which is updated more often, Vibrant Field Guide or 오답노트AI?

Vibrant Field Guide ships an update every 2 days, and 오답노트AI every 2 days. Most recently, Vibrant Field Guide was updated on October 28, 2026 and 오답노트AI on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*