# ZEN browser vs Periodic Table Pocket

The clearest difference is rating: ZEN browser at 3.0 against Periodic Table Pocket's 1.0. ZEN browser also leads on ads (none vs shown) and iOS requirement (9.0 vs 13.0). Periodic Table Pocket's advantage is update cadence (weekly vs every 26 months) and device support (3 vs 1). On price, ratings volume and in-app purchases there is nothing between them.

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

ZEN browser holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

ZEN browser ships an update every 26 months, Periodic Table Pocket weekly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ZEN browser | Periodic Table Pocket |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/zen-browser/id665543029/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/periodic-table-pocket/id6754809340/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Weekly** |
| Monetization | Free | — |
| Size | 45 MB | 26 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [昊 吴](https://appshunter.io/developer/1785101314) |

## What reviewers say

### ZEN browser

[App page](https://appshunter.io/ios/app/zen-browser/id665543029)

This application allows educators and researchers to navigate and view image databases on iPads. It facilitates collaboration by enabling image sharing, annotation, and Z-stack navigation. Access your research data remotely for presentations and discussions.

**Highlights:** Navigate image databases, View Z-stacks, Insert annotations, Share images with colleagues, Access ZEISS demo server

**In-app purchases:** none


### Periodic Table Pocket

[App page](https://appshunter.io/ios/app/periodic-table-pocket/id6754809340)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZEN browser free?

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

### Is Periodic Table Pocket free?

Periodic Table Pocket is free to download, with no in-app purchases.

### Which has better reviews, ZEN browser or Periodic Table Pocket?

ZEN browser is rated higher. ZEN browser averages 3.0 out of 5 from 2 ratings, while Periodic Table Pocket averages 1.0 from 1 ratings.

### Do ZEN browser or Periodic Table Pocket have ads?

Periodic Table Pocket shows ads; ZEN browser does not.

### Which is updated more often, ZEN browser or Periodic Table Pocket?

ZEN browser ships an update every 26 months, and Periodic Table Pocket weekly. Most recently, ZEN browser was updated on October 22, 2026 and Periodic Table Pocket on October 24, 2026.

---

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