# OpenTopo vs Jizerun

The clearest difference is update cadence: OpenTopo at every 2 months against Jizerun's every 12 months. OpenTopo also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

OpenTopo ships an update every 2 months, Jizerun every 12 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | OpenTopo | Jizerun |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Size | 12 MB | 55 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [UX Fans s.r.o.](https://appshunter.io/developer/1438523671) | [Nanooq IT s.r.o.](https://appshunter.io/developer/1130938386) |

## What reviewers say

### OpenTopo

[App page](https://appshunter.io/ios/app/opentopo/id1465778038)

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

**In-app purchases:** none


### Jizerun

[App page](https://appshunter.io/ios/app/jizerun/id6737131105)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenTopo free?

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

### Is Jizerun free?

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

### Do OpenTopo or Jizerun have ads?

Neither OpenTopo nor Jizerun shows ads.

### Which is updated more often, OpenTopo or Jizerun?

OpenTopo ships an update every 2 months, and Jizerun every 12 months. Most recently, OpenTopo was updated on November 6, 2026 and Jizerun on October 30, 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.*