# Zettelbox vs idiogram

The clearest difference is rating: idiogram at 5.0 against Zettelbox's 4.3. Zettelbox's advantage is update cadence (every 2 weeks vs every 2 months) and ratings volume (24 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Zettelbox sells 3 in-app purchases, starting at $4.99 per month and idiogram sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

idiogram holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Zettelbox has 24 ratings behind it against 1, so its average is the more settled of the two.

Zettelbox ships an update every 2 weeks, idiogram every 2 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Zettelbox | idiogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (24 ratings)](https://appshunter.io/ios/app/zettelbox-ai-note-taking/id1605557791/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/idiogram-ideas-and-information/id6450397917/reviews)** |
| Number of ratings | **24** | 1 |
| Positive reviews | 30.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Freemium | Freemium |
| Size | 117 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hong Kong Source Research Society Supply Chain Limited](https://appshunter.io/developer/1761795867) | [Humanist LLC](https://appshunter.io/developer/1154264003) |

## What reviewers say

### 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 |


### idiogram

[App page](https://appshunter.io/ios/app/idiogram-ideas-and-information/id6450397917)

Effortlessly capture and organize your thoughts and information with this app. Record voice notes, save clipboard content, and extract web content. Its semantic search helps you find related notes based on meaning, simplifying knowledge management.

**Highlights:** Voice dictation for quick notes, One-tap clipboard saving, Web content extraction, Summary note generation, Semantic search for related notes, Get Answer feature

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Idiogram Pro - Monthly | $0.99 | per month |


## Frequently asked questions

### Is Zettelbox free?

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

### Is idiogram free?

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

### Which has better reviews, Zettelbox or idiogram?

idiogram is rated higher. Zettelbox averages 4.3 out of 5 from 24 ratings, while idiogram averages 5.0 from 1 ratings.

### Do Zettelbox or idiogram have ads?

Neither Zettelbox nor idiogram shows ads.

### Which is updated more often, Zettelbox or idiogram?

Zettelbox ships an update every 2 weeks, and idiogram every 2 months. Most recently, Zettelbox was updated on October 14, 2026 and idiogram on October 6, 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.*