# Smart PDF Scanner vs Second Brain TokKong

The clearest difference is price: Second Brain TokKong at Free against Smart PDF Scanner's $4.99. Second Brain TokKong also leads on update cadence (weekly vs every 4 months) and rating (5.0 vs 4.7). Smart PDF Scanner's advantage is in-app purchases (none vs 2) and ratings volume (472 vs 1). On ads, monetization model and device support there is nothing between them.

Second Brain TokKong is free to download; Smart PDF Scanner costs $4.99 up front. Second Brain TokKong sells 2 one-off in-app purchases. Smart PDF Scanner asks for nothing beyond the download.

Second Brain TokKong holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Smart PDF Scanner has 472 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of Smart PDF Scanner's written reviews are positive against 100% of Second Brain TokKong's.

Smart PDF Scanner ships an update every 4 months, Second Brain TokKong weekly. The most recent releases landed on October 20, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Smart PDF Scanner | Second Brain TokKong |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.7 (472 ratings)](https://appshunter.io/ios/app/smart-pdf-scanner/id938409051/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/second-brain-tokkong/id6742748996/reviews)** |
| Number of ratings | **472** | 1 |
| Positive reviews | 86.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | Free |
| Size | 12 MB | 1.7 GB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Qrayon, LLC](https://appshunter.io/developer/354980265) | [Bingjun Li](https://appshunter.io/developer/1724710405) |

## What reviewers say

### Smart PDF Scanner

[App page](https://appshunter.io/ios/app/smart-pdf-scanner/id938409051)

Transform your mobile device into a powerful scanner. Capture documents, receipts, and notes with high-quality scans. Organize your files with custom categories and easily share them as PDFs or images.

**Highlights:** High-quality document scanning, Automatic edge detection and perspective correction, Color-coded organization system, Export as PDF or image, Direct sharing via email, AirDrop, and cloud services, FlashAssist for low-light scanning

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 👍 User-friendly interface
- 🚀 Efficient scanning
- 💡 Versatile export options
- 🚀 Quick and convenient

**What reviewers complain about**

- 🐛 Occasional crashes
- 🔍 Difficulty deleting/managing files
- 🔍 Limited customization options
- 🐛 Inconsistent border detection

**Reported bugs**

- Crashes when saving or exporting files
- Inconsistent border detection on certain surfaces

**Requested features**

- Backup and restore functionality
- Batch processing and multi-select options
- OCR and text extraction capabilities
- Improved file management and organization


### Second Brain TokKong

[App page](https://appshunter.io/ios/app/second-brain-tokkong/id6742748996)

This app transcribes voice to text and translates speech offline, all on your device. It offers AI-powered polishing, custom prompts for various text formats, and the ability to chat with PDFs privately.

**Highlights:** Offline voice to text transcription, On-device AI for text polishing, Offline speech translation, Custom AI prompts for various text formats, Chat with uploaded PDFs offline, Siri Shortcuts integration, Export transcripts to SRT and TXT

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TokKong Online AI Service Package | $1.99 | one-time |
| TokKong Pro | $9.99 | one-time |


## Frequently asked questions

### Is Smart PDF Scanner free?

Smart PDF Scanner costs $4.99, with no in-app purchases.

### Is Second Brain TokKong free?

Second Brain TokKong is free to download, with in-app purchases available.

### Which has better reviews, Smart PDF Scanner or Second Brain TokKong?

Second Brain TokKong is rated higher. Smart PDF Scanner averages 4.7 out of 5 from 472 ratings, while Second Brain TokKong averages 5.0 from 1 ratings.

### Do Smart PDF Scanner or Second Brain TokKong have ads?

Neither Smart PDF Scanner nor Second Brain TokKong shows ads.

### Which is updated more often, Smart PDF Scanner or Second Brain TokKong?

Smart PDF Scanner ships an update every 4 months, and Second Brain TokKong weekly. Most recently, Smart PDF Scanner was updated on October 20, 2026 and Second Brain TokKong on October 2, 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.*