# Smartune vs PDF Merge

The clearest difference is in-app purchases: Smartune at none against PDF Merge's 4. PDF Merge's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDF Merge sells 4 in-app purchases, starting at $4.99 per 7 days. Smartune asks for nothing beyond the download.

Smartune ships an update every 9 days, PDF Merge weekly. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Smartune | PDF Merge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (11 ratings)](https://appshunter.io/ios/app/pdf-merge-document-sign-pdf/id6475400436/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 27 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [LED Smart Inc.](https://appshunter.io/developer/1522067250) | [AppFlux Labs](https://appshunter.io/developer/1882687293) |

## What reviewers say

### Smartune

[App page](https://appshunter.io/ios/app/smartune/id6444778793)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Merge

[App page](https://appshunter.io/ios/app/pdf-merge-document-sign-pdf/id6475400436)

Easily merge multiple PDF files into one cohesive document or split large PDFs into smaller sections. This app also allows you to fill out forms and add your signature directly within the application.

**Highlights:** Merge multiple PDFs, Split large PDFs, Fill and sign documents, Convert images to PDF, User-friendly interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $4.99 | per 7 days |
| Unlimited Access | $5.99 | per month |
| Unlimited Access | $24.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Smartune free?

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

### Is PDF Merge free?

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

### Do Smartune or PDF Merge have ads?

Neither Smartune nor PDF Merge shows ads.

### Which is updated more often, Smartune or PDF Merge?

Smartune ships an update every 9 days, and PDF Merge weekly. Most recently, Smartune was updated on October 4, 2026 and PDF Merge 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.*