# PDF Reader vs Stackably Admin

The clearest difference is in-app purchases: Stackably Admin at none against PDF Reader's 2. Stackably Admin also leads on ads (none vs shown) and update cadence (every 9 days vs every 3 weeks). PDF Reader's advantage is iOS requirement (14.0 vs 17.6). On price, rating and device support there is nothing between them.

Both are free to download. PDF Reader sells 2 in-app purchases, starting at $19.99 per 7 days. Stackably Admin asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PDF Reader against 5.0 for Stackably Admin. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

PDF Reader ships an update every 3 weeks, Stackably Admin every 9 days. The most recent releases landed on June 11, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | PDF Reader | Stackably Admin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-reader-editing/id6742738204/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/stackably-admin/id6752793139/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 26 MB | 106 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [蕊 安](https://appshunter.io/developer/1665482948) | [Stackably LLC,](https://appshunter.io/developer/1840776906) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-editing/id6742738204)

Easily read, annotate, and edit PDF documents with a comprehensive suite of tools. Mark important information, add text, signatures, and even merge or convert files. Secure your documents with password protection.

**Highlights:** Highlight and underline text, Hand-drawn annotation, Add text and fill forms, Digital signature and seal, Merge PDF files, Convert PDF to Word/JPG, Password protection

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Bronze | $19.99 | per 7 days |
| Premium Gold | $39.99 | per year |


### Stackably Admin

[App page](https://appshunter.io/ios/app/stackably-admin/id6752793139)

This app helps you manage tasks, schedules, and projects for both personal and professional life. It offers features like task management, calendar integration, finance tracking, and collaboration tools to keep everything organized in one place.

**Highlights:** Task management with reminders, Calendar integration, Finance tracking and budgeting, Project collaboration tools, Notes and document storage, Secure data protection, Customizable interface

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Reader free?

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

### Is Stackably Admin free?

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

### Which has better reviews, PDF Reader or Stackably Admin?

PDF Reader and Stackably Admin are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do PDF Reader or Stackably Admin have ads?

PDF Reader shows ads; Stackably Admin does not.

### Which is updated more often, PDF Reader or Stackably Admin?

PDF Reader ships an update every 3 weeks, and Stackably Admin every 9 days. Most recently, PDF Reader was updated on June 11, 2026 and Stackably Admin on September 20, 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.*