# +Compass+ vs ZSElmer

The clearest difference is ads: ZSElmer at none against +Compass+'s shown. +Compass+'s advantage is update cadence (monthly vs every 7 months) and iOS requirement (13.0 vs 15.6). On price, 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.

+Compass+ ships an update monthly, ZSElmer every 7 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | +Compass+ | ZSElmer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/zselmer/id6752545485/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | — | Free |
| Size | 5 MB | 96 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Todd](https://appshunter.io/developer/1211079532) | [Alecia Vermeulen](https://appshunter.io/developer/1678098669) |

## What reviewers say

### +Compass+

[App page](https://appshunter.io/ios/app/plus-compass-plus/id6578449109)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZSElmer

[App page](https://appshunter.io/ios/app/zselmer/id6752545485)

This app serves as a digital logbook and satellite tracker for amateur radio enthusiasts. It allows users to log contacts, monitor satellite positions, and connect with a global community of radio operators. Designed for both new and experienced users, it facilitates sharing experiences and learning from mentors.

**Highlights:** Real-time satellite tracking, Predict satellite passes, Quick QSO logging, ADIF, Cabrillo, CSV import/export, Community sharing features, Live antenna pointing data

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is +Compass+ free?

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

### Is ZSElmer free?

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

### Do +Compass+ or ZSElmer have ads?

+Compass+ shows ads; ZSElmer does not.

### Which is updated more often, +Compass+ or ZSElmer?

+Compass+ ships an update monthly, and ZSElmer every 7 months. Most recently, +Compass+ was updated on October 5, 2026 and ZSElmer on October 12, 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.*