# PDF Reader vs HydroPing

The clearest difference is rating: HydroPing at 5.0 against PDF Reader's 4.3. HydroPing also leads on update cadence (every 3 weeks vs every 2 months). PDF Reader's advantage is ratings volume (3.9K vs 2) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HydroPing holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: PDF Reader has 3.9K ratings behind it against 2, so its average is the more settled of the two.

PDF Reader ships an update every 2 months, HydroPing every 3 weeks. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PDF Reader | HydroPing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3.9K ratings)](https://appshunter.io/ios/app/pdf-reader-pdfelement/id1150215996/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hydroping/id6757090997/reviews)** |
| Number of ratings | **3.9K** | 2 |
| Positive reviews | 76.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 173 MB | 31 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Wondershare Technology (Hunan) Co.,Ltd.](https://appshunter.io/developer/1721309409) | [Eris Verne](https://appshunter.io/developer/1824870697) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-pdfelement/id1150215996)

This app offers a superior PDF reading experience with its innovative Liquid Mode, which optimizes documents for mobile screens. It also provides robust tools for annotating, signing, managing, and sharing your PDF files, catering to both work and study needs.

**Highlights:** Liquid Mode for optimized mobile reading, Annotation tools (pencil, text, highlighting), Handwritten signature insertion, File management (move, merge, copy, delete), Cloud service integration (Wondershare, iCloud), Create blank PDFs and folders

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient PDF editing
- 💡 Useful annotation tools
- 🚀 Convenient for students/professionals
- 👍 Great value for free app

**What reviewers complain about**

- 🐛 Crashes and glitches
- 🔒 Privacy concerns with account requirement
- 👎 Unintuitive user interface
- 🐛 Unreliable saving/syncing
- 👎 Limited functionality compared to paid version

**Reported bugs**

- Text boxes appearing randomly
- Inability to select/edit text in some PDFs
- Scrolling issues and page loading delays
- Incompatibility with certain PDF formats

**Requested features**

- Ability to edit text formatting (font, size, color)
- Support for multiple open documents
- Improved Apple Pencil integration
- Bookmark/favorite feature for frequently used PDFs
- Expanded cloud storage integration (OneDrive, Google Drive, etc.)


### HydroPing

[App page](https://appshunter.io/ios/app/hydroping/id6757090997)

This app works with smart plant implants to prevent over and under-watering. It uses AI to provide real-time guidance for optimal soil conditions and monitors plant health. Manage multiple plants, devices, and orders with ease.

**Highlights:** AI-powered plant care guidance, Real-time soil condition monitoring, Manage 50+ plants, Device activation and deactivation, Order and invoice management, Troubleshoot device connectivity

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is PDF Reader free?

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

### Is HydroPing free?

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

### Which has better reviews, PDF Reader or HydroPing?

HydroPing is rated higher. PDF Reader averages 4.3 out of 5 from 3.9K ratings, while HydroPing averages 5.0 from 2 ratings.

### Do PDF Reader or HydroPing have ads?

Neither PDF Reader nor HydroPing shows ads.

### Which is updated more often, PDF Reader or HydroPing?

PDF Reader ships an update every 2 months, and HydroPing every 3 weeks. Most recently, PDF Reader was updated on October 14, 2026 and HydroPing on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*