# OTAMap vs EIRP Calculator

The clearest difference is price: EIRP Calculator at Free against OTAMap's $2.99. OTAMap's advantage is update cadence (every 38 months vs every 129 months) and iOS requirement (15.0 vs 17.5). On ads, in-app purchases and device support there is nothing between them.

EIRP Calculator is free to download; OTAMap costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OTAMap ships an update every 38 months, EIRP Calculator every 129 months. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | OTAMap | EIRP Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.6 (9 ratings)](https://appshunter.io/ios/app/otamap/id441016695/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 38 months** | Every 129 months |
| Monetization | Paid | — |
| Size | 23 MB | 0 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arctic Surf Designs](https://appshunter.io/developer/441016698) | [Pulsely Consulting](https://appshunter.io/developer/475349326) |

## What reviewers say

### OTAMap

[App page](https://appshunter.io/ios/app/otamap/id441016695)

Locate and aim your antenna for Over The Air (OTA) television and FM stations. View transmission tower positions relative to your location to optimize reception for local or distant channels. Supports continental USA, Alaska, Canada, Hawaii, and Northern Mexico.

**Highlights:** Find OTA TV and FM stations, View transmission tower locations, Optimize antenna aiming, Filter stations by distance, power, and contour, Save and recall locations, Offline mapping functionality

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

**In-app purchases:** none


### EIRP Calculator

[App page](https://appshunter.io/ios/app/eirp-calculator/id785448118)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OTAMap free?

OTAMap costs $2.99, with no in-app purchases.

### Is EIRP Calculator free?

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

### Do OTAMap or EIRP Calculator have ads?

Neither OTAMap nor EIRP Calculator shows ads.

### Which is updated more often, OTAMap or EIRP Calculator?

OTAMap ships an update every 38 months, and EIRP Calculator every 129 months. Most recently, OTAMap was updated on October 16, 2026 and EIRP Calculator on October 1, 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.*