# Extreme Calendar vs Smart PDF Scanner

The clearest difference is in-app purchases: Smart PDF Scanner at none against Extreme Calendar's 1. Smart PDF Scanner also leads on rating (4.7 vs 4.3) and ratings volume (472 vs 24). Extreme Calendar's advantage is iOS requirement (12.0 vs 16.6). On update cadence, ads, chart position and device support there is nothing between them.

Extreme Calendar costs $7.99 and Smart PDF Scanner $4.99 up front. Extreme Calendar sells 1 one-off in-app purchase. Smart PDF Scanner asks for nothing beyond the download.

Smart PDF Scanner holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Smart PDF Scanner has 472 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 73% of Extreme Calendar's written reviews are positive against 86% of Smart PDF Scanner's.

Both ship on a similar rhythm, roughly every 4 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Extreme Calendar | Smart PDF Scanner |
| --- | --- | --- |
| Price | $7.99 | **$4.99** |
| Rating | [4.3 (24 ratings)](https://appshunter.io/ios/app/extreme-calendar/id431771565/reviews) | **[4.7 (472 ratings)](https://appshunter.io/ios/app/smart-pdf-scanner/id938409051/reviews)** |
| Number of ratings | 24 | **472** |
| Positive reviews | 73.0% of reviews | **86.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#192** | #197 |
| Size | 30 MB | 12 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Birdsoft LLC](https://appshunter.io/developer/293366061) | [Qrayon, LLC](https://appshunter.io/developer/354980265) |

## What reviewers say

### Extreme Calendar

[App page](https://appshunter.io/ios/app/extreme-calendar/id431771565)

**Currently charting:** #192 Top Paid · Business (US App Store)

This powerful calendar app offers advanced views and flexible event management for busy individuals. It integrates with native calendar data and provides quick event entry, with options to expand functionality through in-app purchases.

**Highlights:** Advanced calendar views (Year, Month, Week, Day, Agenda), Birthdays and Anniversaries from contacts, Advanced repeating event options, Move/Copy Events, Natural Language Entry, Event Templates, Syncs with native calendar data

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extreme Agenda | $3.99 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 📅 Multiple view options (day, week, month, agenda)
- 🎨 Customizable icons and visual organization
- 🔄 Reliable syncing across devices
- ⏰ Multiple reminder/alarm options

**What reviewers complain about**

- 🐛 Frequent app crashes and instability
- ⚠️ Data loss and disappearing events
- 🔄 Syncing issues between devices
- ⏱️ Slow app performance and loading times
- 🎨 Limited icon selection in free version

**Reported bugs**

- App crashes on launch or during use
- Events disappearing without explanation
- Bouncy event creation window causing data loss
- Syncing failures between iPhone and iPad
- App becomes unresponsive with large contact lists

**Requested features**

- More diverse icon options
- Better alarm/reminder sound variety
- Ability to display notes in monthly view
- Drag-and-drop appointment editing
- Double-tap to create appointments


### Smart PDF Scanner

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

**Currently charting:** #197 Top Paid · Business (US App Store)

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


## Frequently asked questions

### Is Extreme Calendar free?

Extreme Calendar costs $7.99, and also offers in-app purchases.

### Is Smart PDF Scanner free?

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

### Which has better reviews, Extreme Calendar or Smart PDF Scanner?

Smart PDF Scanner is rated higher. Extreme Calendar averages 4.3 out of 5 from 24 ratings, while Smart PDF Scanner averages 4.7 from 472 ratings.

### Do Extreme Calendar or Smart PDF Scanner have ads?

Neither Extreme Calendar nor Smart PDF Scanner shows ads.

### Which is updated more often, Extreme Calendar or Smart PDF Scanner?

Extreme Calendar ships an update every 4 months, and Smart PDF Scanner every 4 months. Most recently, Extreme Calendar was updated on October 26, 2026 and Smart PDF Scanner on October 26, 2026.

### Which is more popular, Extreme Calendar or Smart PDF Scanner?

Extreme Calendar currently peaks at #192 in the App Store charts, and Smart PDF Scanner at #197. Chart position reflects recent download velocity rather than total install base.

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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.*