# CSI vs PDF Converter

The clearest difference is in-app purchases: CSI at none against PDF Converter's 2. CSI also leads on ads (none vs shown). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $5.99 per 7 days. CSI asks for nothing beyond the download.

CSI ships an update monthly, PDF Converter every 2 weeks. The most recent releases landed on October 4, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CSI | PDF Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (22 ratings)](https://appshunter.io/ios/app/pdf-converter-ocr-reader/id6758373190/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | **26.9% of reviews** | 21.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 93 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MVM Ingenieria de Software S.A.S](https://appshunter.io/developer/1494519769) | [Hitek Limited](https://appshunter.io/developer/6774064976) |

## What reviewers say

### CSI

[App page](https://appshunter.io/ios/app/csi/id1494519770)

This application is designed to collect information through surveys. It helps in segmenting consumers by gathering valuable data.

**Highlights:** Collect survey information, Consumer segmentation, Data gathering

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-ocr-reader/id6758373190)

Effortlessly transform paper documents into digital files with scanning, text recognition, and editing tools. Ideal for students, professionals, and everyday users needing to organize and manage documents.

**Highlights:** Photo scanning to digital files, OCR text recognition and copying, Import and view local PDFs, Page management (delete, rearrange), Highlighting and annotation tools, Intuitive user interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter Ad-Free | $5.99 | per 7 days |
| PDF Converter Ad-Free | $29.99 | per year |


## Frequently asked questions

### Is CSI free?

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

### Is PDF Converter free?

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

### Do CSI or PDF Converter have ads?

PDF Converter shows ads; CSI does not.

### Which is updated more often, CSI or PDF Converter?

CSI ships an update monthly, and PDF Converter every 2 weeks. Most recently, CSI was updated on October 4, 2026 and PDF Converter on October 12, 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.*