# HLL Pdf Reader vs Synapse Reads

The clearest difference is update cadence: Synapse Reads at every 4 weeks against HLL Pdf Reader's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

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

HLL Pdf Reader ships an update every 9 months, Synapse Reads every 4 weeks. The most recent releases landed on October 19, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | HLL Pdf Reader | Synapse Reads |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hll-pdf-reader/id1083359852/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 15 MB | 32 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [hades lade lam](https://appshunter.io/developer/1066160322) | [Ansh Dave](https://appshunter.io/developer/1862968247) |

## What reviewers say

### HLL Pdf Reader

[App page](https://appshunter.io/ios/app/hll-pdf-reader/id1083359852)

This app offers a streamlined PDF reading experience with an iBooks-inspired interface. It provides features like recent reading history, page cropping for larger content views, and an outline for easy navigation. Zooming is simplified with double-tap gestures.

**Highlights:** iBooks-like design, Reading history, Page cropping, Document outline, Double-tap zoom, Automatic fit on rotation

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

**In-app purchases:** none


### Synapse Reads

[App page](https://appshunter.io/ios/app/synapse-reads/id6756804825)

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

**In-app purchases:** none


## Frequently asked questions

### Is HLL Pdf Reader free?

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

### Is Synapse Reads free?

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

### Do HLL Pdf Reader or Synapse Reads have ads?

Neither HLL Pdf Reader nor Synapse Reads shows ads.

### Which is updated more often, HLL Pdf Reader or Synapse Reads?

HLL Pdf Reader ships an update every 9 months, and Synapse Reads every 4 weeks. Most recently, HLL Pdf Reader was updated on October 19, 2026 and Synapse Reads on October 11, 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.*