# Pdf Reader vs Sumi

The clearest difference is update cadence: Sumi at every 5 days against Pdf Reader's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pdf Reader sells 1 one-off in-app purchase and Sumi sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Pdf Reader ships an update monthly, Sumi every 5 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Pdf Reader | Sumi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Size | 1 MB | 8 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Muhammed Efdal incesu](https://appshunter.io/developer/1748859357) | [Sigit Kuncoro](https://appshunter.io/developer/1889728747) |

## What reviewers say

### Pdf Reader

[App page](https://appshunter.io/ios/app/pdf-reader-view-pdfs/id6608980545)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pdf Reader Lifetime Premium | $2.99 | one-time |


### Sumi

[App page](https://appshunter.io/ios/app/sumi-notepad-calculator/id6816366548)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7‑Day Pro Trial | Free | one-time |
| Sumi Pro | $7.99 | one-time |


## Frequently asked questions

### Is Pdf Reader free?

Pdf Reader is free to download, with in-app purchases available.

### Is Sumi free?

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

### Do Pdf Reader or Sumi have ads?

Neither Pdf Reader nor Sumi shows ads.

### Which is updated more often, Pdf Reader or Sumi?

Pdf Reader ships an update monthly, and Sumi every 5 days. Most recently, Pdf Reader was updated on October 27, 2026 and Sumi on October 31, 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.*