# PatternBank vs ARC Private PDF Scanner

The clearest difference is price: PatternBank at Free against ARC Private PDF Scanner's $0.99. On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

PatternBank is free to download; ARC Private PDF Scanner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PatternBank ships an update every 2 weeks, ARC Private PDF Scanner fortnightly. The most recent releases landed on October 16, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | PatternBank | ARC Private PDF Scanner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/patternbank/id6759760762/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | **Free** | Paid |
| Size | 35 MB | 2 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yi Zhang](https://appshunter.io/developer/1880518233) | [GOLDEN ARC DIGITAL INC.](https://appshunter.io/developer/1462423563) |

## What reviewers say

### PatternBank

[App page](https://appshunter.io/ios/app/patternbank/id6759760762)

This app helps you remember coding solutions by turning solved problems into spaced repetition reviews. Track your progress, confidence, and review schedules to master algorithms and prepare for technical interviews.

**Highlights:** Track algorithm problems by title, difficulty, confidence, notes, and patterns, Review problems on a spaced repetition schedule, Rate confidence from 1 to 5 stars, Connect public LeetCode Activity, Daily workflow with due reviews and LeetCode solves, Track progress by pattern and review history

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

**In-app purchases:** none


### ARC Private PDF Scanner

[App page](https://appshunter.io/ios/app/arc-private-pdf-scanner/id6817884165)

This app transforms paper documents into editable text directly on your device. It offers multiple export formats, including searchable PDFs and structured JSON, ensuring your data remains private and secure. Enjoy powerful scanning and text recognition without ads or subscriptions.

**Highlights:** On-device text recognition, Multiple export formats (PDF, TXT, JSON), Multi-page scanning, Automatic edge detection, No ads or tracking, One-time purchase

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

**In-app purchases:** none


## Frequently asked questions

### Is PatternBank free?

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

### Is ARC Private PDF Scanner free?

ARC Private PDF Scanner costs $0.99, with no in-app purchases.

### Do PatternBank or ARC Private PDF Scanner have ads?

Neither PatternBank nor ARC Private PDF Scanner shows ads.

### Which is updated more often, PatternBank or ARC Private PDF Scanner?

PatternBank ships an update every 2 weeks, and ARC Private PDF Scanner fortnightly. Most recently, PatternBank was updated on October 16, 2026 and ARC Private PDF Scanner on October 26, 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.*