# SiiAPP vs PDF Converter ©

The clearest difference is rating: PDF Converter © at 4.5 against SiiAPP's 1.0. PDF Converter © also leads on ratings volume (101 vs 1). SiiAPP's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. PDF Converter © sells 6 in-app purchases, starting at $6.99 per 7 days. SiiAPP asks for nothing beyond the download.

PDF Converter © holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: PDF Converter © has 101 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 12% of SiiAPP's written reviews are positive against 0% of PDF Converter ©'s, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SiiAPP | PDF Converter © |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/siiapp/id1488201798/reviews) | **[4.5 (101 ratings)](https://appshunter.io/ios/app/pdf-converter/id1661519591/reviews)** |
| Number of ratings | 1 | **101** |
| Positive reviews | **12.3% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 61 MB | 53 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +17 |
| Developer | [Oscar Mendez Hernandez](https://appshunter.io/developer/1488201797) | [Smart Technology by Flexi](https://appshunter.io/developer/1850398589) |

## What reviewers say

### SiiAPP

[App page](https://appshunter.io/ios/app/siiapp/id1488201798)

Easily access class schedules, teacher details, and professor reviews. View past academic cycles and customize your timetable. Offline access available for loaded information.

**Highlights:** Classroom and teacher lookup, Professor reviews and ratings, Customizable timetable design, Past academic cycle schedules, Offline access to data

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Converter ©

[App page](https://appshunter.io/ios/app/pdf-converter/id1661519591)

This app is a comprehensive PDF tool for converting, editing, and managing your documents. Easily transform various file types into PDFs, add signatures, extract text from images, and merge files into a single document. Share your creations seamlessly.

**Highlights:** Convert photos to PDF, Convert Word files to PDF, Add signatures to PDFs, Extract text from images, Merge multiple files into one PDF, Supports wide range of formats

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Weekly VIP | $6.99 | per 7 days |
| Unlimited Weekly3DayTrail VIP | $6.99 | per 7 days |
| Unlimited Monthly VIP | $14.99 | per month |
| Unlimited Yearly VIP | $39.99 | per year |
| PDF Converter VIP Lifetime | $39.99 | one-time |
| VIP Unlimited Lifetime | $59.99 | one-time |

**What reviewers complain about**

- 💸 Forced subscription/paywall
- 👎 No free functionality
- 💰 Expensive subscription fees
- ⏳ Waste of time and money
- 😠 Dishonest pricing/billing

**Reported bugs**

- Cannot unsubscribe
- Charges after cancellation

**Requested features**

- Clearer saving/exporting steps
- Option to name converted PDFs
- Free version with ads
- More upfront information about costs


## Frequently asked questions

### Is SiiAPP free?

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

### Is PDF Converter © free?

PDF Converter © is free to download, with in-app purchases available.

### Which has better reviews, SiiAPP or PDF Converter ©?

PDF Converter © is rated higher. SiiAPP averages 1.0 out of 5 from 1 ratings, while PDF Converter © averages 4.5 from 101 ratings.

### Do SiiAPP or PDF Converter © have ads?

PDF Converter © shows ads; SiiAPP does not.

### Which is updated more often, SiiAPP or PDF Converter ©?

SiiAPP ships an update fortnightly, and PDF Converter © fortnightly. Most recently, SiiAPP was updated on October 22, 2026 and PDF Converter © on October 24, 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.*