# Holdover Calculator vs ATIS App

The clearest difference is rating: Holdover Calculator at 5.0 against ATIS App's 4.3. Holdover Calculator also leads on ads (none vs shown) and review sentiment (83% vs 64%). ATIS App's advantage is monetization model (free with in-app purchases vs subscription) and ratings volume (40 vs 1). On price, update cadence, in-app purchases and device support 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 App sells 1 in-app purchase, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

Holdover Calculator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: ATIS App has 40 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Holdover Calculator's written reviews are positive against 64% of ATIS App's.

Holdover Calculator ships an update every 6 weeks, ATIS App every 2 months. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Holdover Calculator | ATIS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/holdover-calculator/id768019181/reviews)** | [4.3 (40 ratings)](https://appshunter.io/ios/app/atis-app/id1498344508/reviews) |
| Number of ratings | 1 | **40** |
| Positive reviews | **83.3% of reviews** | 63.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#195** | — |
| Size | 24 MB | 40 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Kilo Lima Management, LLC](https://appshunter.io/developer/767164799) | [iawix ltd.](https://appshunter.io/developer/1498344507) |

## What reviewers say

### Holdover Calculator

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

**Currently charting:** #195 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 App

[App page](https://appshunter.io/ios/app/atis-app/id1498344508)

Access real-time airport weather and operational information for major US airports. Receive instant notifications when critical updates are made. No account is required to view current data.

**Highlights:** Live Digital ATIS viewing, Instant push notifications, No account required, Default airport setting, Favorite airports, Extensive US airport coverage

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ATIS App Ad Free Subscription | $4.99 | per year |


## Frequently asked questions

### Is Holdover Calculator free?

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

### Is ATIS App free?

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

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

Holdover Calculator is rated higher. Holdover Calculator averages 5.0 out of 5 from 1 ratings, while ATIS App averages 4.3 from 40 ratings.

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

ATIS App shows ads; Holdover Calculator does not.

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

Holdover Calculator ships an update every 6 weeks, and ATIS App every 2 months. Most recently, Holdover Calculator was updated on October 9, 2026 and ATIS App on October 20, 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.*