# Notewise vs SIGMA

The clearest difference is in-app purchases: SIGMA at none against Notewise's 16. SIGMA also leads on iOS requirement (13.0 vs 26.0). Notewise's advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. Notewise sells 16 in-app purchases, starting at $4.99 per month. SIGMA asks for nothing beyond the download.

Notewise ships an update every 2 days, SIGMA monthly. The most recent releases landed on September 22, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Notewise | SIGMA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (271 ratings)](https://appshunter.io/ios/app/notewise-ai-notes-pdf-docs/id6480045936/reviews)** | — |
| Number of ratings | **271** | — |
| Positive reviews | 54.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 427 MB | 25 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZIIKR](https://appshunter.io/developer/1535317711) | [Turker KAYALIOLU](https://appshunter.io/developer/1851236946) |

## What reviewers say

### Notewise

[App page](https://appshunter.io/ios/app/notewise-ai-notes-pdf-docs/id6480045936)

This app offers a versatile digital canvas for note-taking, PDF annotation, and sketching. It leverages AI to summarize content, generate quizzes, and transcribe audio. Designed for students, professionals, and creators, it provides tools for organization, collaboration, and enhanced productivity.

**Highlights:** AI-powered note summarization and quizzing, Handwritten notes and PDF annotation, Audio recording with synced transcripts, OCR for searchable handwriting, Real-time collaboration, Infinite freeform canvas

**Features:** Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notewise Cloud Basic Monthly | $4.99 | per month |
| Notewise Cloud Starter Monthly | $6.99 | per month |
| Notewise Cloud Pro Monthly | $15.99 | per month |
| Notewise Cloud Basic Yearly | $28.99 | per year |
| Notewise Cloud Starter Yearly | $36.99 | per year |
| Notewise Cloud Pro Yearly | $129.99 | per year |
| Notewise Marketplace Content | $1.99 | one-time |
| Notewise Marketplace Content | $2.99 | one-time |
| Notewise Marketplace Content | $3.99 | one-time |
| Notewise Marketplace Content | $4.99 | one-time |
| Notewise Marketplace Content | $5.99 | one-time |
| Notewise Marketplace Content | $6.99 | one-time |
| Notewise Marketplace Content | $7.99 | one-time |
| Notewise Marketplace Content | $8.99 | one-time |
| Notewise Marketplace Content | $9.99 | one-time |
| Notewise Unlimited | $19.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 🔄 Excellent cross-platform synchronization (Android, iOS, Mac, PC)
- ✨ Comprehensive feature set with tables, shapes, and drawing tools
- 🎨 High-quality dark mode implementation
- 📱 Works seamlessly across multiple devices

**What reviewers complain about**

- 🐛 Frequent app crashes after updates
- 🐛 Handwriting and annotations disappearing randomly
- 🐛 Lasso selection tool includes unwanted background
- 🐛 App freezes and lags when highlighting large areas
- 🐛 Text input fields not functioning properly

**Reported bugs**

- App crashes on every update
- Handwritten content randomly disappears
- Annotations vanishing intermittently
- Lasso selection tool malfunctions
- Text input fields not responding

**Requested features**

- Add layers feature for advanced editing
- Implement automatic zoom box that follows writing
- Add pencil, waterbrush, and crayon drawing tools
- Sticker marketplace or sticker customization
- Horizontal page flipping/swiping navigation


### SIGMA

[App page](https://appshunter.io/ios/app/sigma/id6754983866)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Notewise free?

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

### Is SIGMA free?

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

### Do Notewise or SIGMA have ads?

Neither Notewise nor SIGMA shows ads.

### Which is updated more often, Notewise or SIGMA?

Notewise ships an update every 2 days, and SIGMA monthly. Most recently, Notewise was updated on September 22, 2026 and SIGMA on September 5, 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.*