# Holdover Calculator vs ATIS Relay

Holdover Calculator and ATIS Relay both sit at 5.0 stars, but that hides the real split: 83% of Holdover Calculator's written reviews are positive against 0% of ATIS Relay's. Holdover Calculator also leads on update cadence (every 6 weeks vs every 9 months) and chart position (#191 vs unranked). ATIS Relay's advantage is monetization model (freemium vs subscription) and iOS requirement (17.0 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Holdover Calculator sells 1 in-app purchase, starting at $9.99 per year and ATIS Relay sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Holdover Calculator against 5.0 for ATIS Relay. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 83% of Holdover Calculator's written reviews are positive against 0% of ATIS Relay's.

Holdover Calculator ships an update every 6 weeks, ATIS Relay every 9 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Holdover Calculator | ATIS Relay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/holdover-calculator/id768019181/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/atis-relay/id6479165645/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | **83.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Subscription | **Freemium** |
| Best chart rank | **#191** | — |
| Size | 24 MB | 20 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kilo Lima Management, LLC](https://appshunter.io/developer/767164799) | [Ford Davis](https://appshunter.io/developer/619717963) |

## What reviewers say

### Holdover Calculator

[App page](https://appshunter.io/ios/app/holdover-calculator/id768019181)

**Currently charting:** #191 Top Grossing · Weather (US App Store)

This tool simplifies the calculation of aircraft de-icing fluid holdover times. It offers manual input or automatic weather data retrieval for quick and accurate results. The app provides alerts for expired times and includes a pre-takeoff check timer.

**Highlights:** Accurate holdover time verification, User-friendly input display, Automatic METAR weather retrieval, Location-based METAR search, Active holdover time countdown, Audible and visible expiration alerts, Pre-takeoff contamination check timer

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year Subscription | $9.99 | per year |


### ATIS Relay

[App page](https://appshunter.io/ios/app/atis-relay/id6479165645)

Access real-time ATIS and weather information for over 160 US airports. Get live audio, transcripts, and digital ATIS updates. Features include METARs and customizable home screen widgets.

**Highlights:** Live ATIS audio and transcripts, Digital ATIS for 76 airports, Free community access to ATIS, METARs and interpreted METARs, Customizable METAR widgets, Text message ATIS updates (subscription)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ATIS Relay Plus (Monthly) | $5.99 | per month |
| ATIS Relay Plus (Annual) | $24.99 | per year |


## Frequently asked questions

### Is Holdover Calculator free?

Holdover Calculator is free to download, with in-app purchases available.

### Is ATIS Relay free?

ATIS Relay is free to download, with in-app purchases available.

### Which has better reviews, Holdover Calculator or ATIS Relay?

Holdover Calculator and ATIS Relay are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Holdover Calculator or ATIS Relay have ads?

Neither Holdover Calculator nor ATIS Relay shows ads.

### Which is updated more often, Holdover Calculator or ATIS Relay?

Holdover Calculator ships an update every 6 weeks, and ATIS Relay every 9 months. Most recently, Holdover Calculator was updated on October 24, 2026 and ATIS Relay on October 24, 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.*