# Study Guide Pro vs Zettelbox

The clearest difference is price: Zettelbox at Free against Study Guide Pro's $2.99. Zettelbox also leads on review sentiment (31% vs 0%) and update cadence (every 2 weeks vs every 2 months). Study Guide Pro's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Zettelbox is free to download; Study Guide Pro costs $2.99 up front. Zettelbox sells 3 in-app purchases, starting at $4.99 per month. Study Guide Pro asks for nothing beyond the download.

Zettelbox holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Zettelbox has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Study Guide Pro's written reviews are positive against 31% of Zettelbox's.

Study Guide Pro ships an update every 2 months, Zettelbox every 2 weeks. Both last shipped on September 10, 2026.

## The numbers

| Metric | Study Guide Pro | Zettelbox |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/study-guide-pro/id916066498/reviews) | **[4.3 (24 ratings)](https://appshunter.io/ios/app/zettelbox-ai-note-taking/id1605557791/reviews)** |
| Number of ratings | 2 | **24** |
| Positive reviews | 0.0% of reviews | **30.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 117 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Pablo Arista](https://appshunter.io/developer/912273635) | [Hong Kong Source Research Society Supply Chain Limited](https://appshunter.io/developer/1761795867) |

## What reviewers say

### Study Guide Pro

[App page](https://appshunter.io/ios/app/study-guide-pro/id916066498)

Create and review custom study guides for any subject. Organize questions and answers, randomize them for practice, and access your guides on your Apple Watch. Perfect for preparing for quizzes, tests, and certifications.

**Highlights:** Create custom study guides, Add questions and answers, Randomize question order, Create multiple guides, Edit existing entries, Apple Watch integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Zettelbox

[App page](https://appshunter.io/ios/app/zettelbox-ai-note-taking/id1605557791)

Capture inspiration and organize your life with this app that integrates notes, to-dos, and scheduling. It helps transform scattered information into a structured knowledge base through smart review and related note linking. Enjoy secure local storage with optional cloud backups.

**Highlights:** Quick note capture with desktop widget, Intuitive tagging and nested categorization, Smart review to rediscover past thoughts, Link related notes for deeper understanding, Local encrypted storage, Cloud backup support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $4.99 | per month |
| Yearly Plan | $19.99 | per year |
| PowerPack Permanent | $64.99 | one-time |


## Frequently asked questions

### Is Study Guide Pro free?

Study Guide Pro costs $2.99, with no in-app purchases.

### Is Zettelbox free?

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

### Which has better reviews, Study Guide Pro or Zettelbox?

Zettelbox is rated higher. Study Guide Pro averages 4.0 out of 5 from 2 ratings, while Zettelbox averages 4.3 from 24 ratings.

### Do Study Guide Pro or Zettelbox have ads?

Neither Study Guide Pro nor Zettelbox shows ads.

### Which is updated more often, Study Guide Pro or Zettelbox?

Study Guide Pro ships an update every 2 months, and Zettelbox every 2 weeks. Most recently, Study Guide Pro was updated on September 10, 2026 and Zettelbox on September 10, 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.*