# Winter OPS vs Safe Sky

The clearest difference is in-app purchases: Safe Sky at none against Winter OPS's 7. Safe Sky also leads on update cadence (every 6 weeks vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Winter OPS sells 7 in-app purchases, starting at $7.49 per year. Safe Sky asks for nothing beyond the download.

Winter OPS ships an update every 8 months, Safe Sky every 6 weeks. The most recent releases landed on September 12, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | Winter OPS | Safe Sky |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 65 MB | 64 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Avimont GmbH](https://appshunter.io/developer/488879220) | [Safe Sky Industries, Inc.](https://appshunter.io/developer/1459357550) |

## What reviewers say

### Winter OPS

[App page](https://appshunter.io/ios/app/winter-ops/id488881673)

This application assists with de-icing and anti-icing procedures by providing holdover time calculations based on official guidelines. It also decodes SNOWTAMs and offers customizable alerts for approaching expiry times, aiding aviation operations in winter conditions.

**Highlights:** Holdover Time (HOT) calculations, SNOWTAM decoding, Customizable expiry time alerts, Qualified fluid information, Weather definitions, Dark mode support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 year generic Fluids (FAA) | $7.49 | per year |
| 1 year generic Fluids (EASA) | $7.49 | per year |
| 1 year generic Fluids (TC) | $7.49 | per year |
| 1 year all Fluids (FAA) | $12.49 | per year |
| 1 year all Fluids (EASA) | $12.49 | per year |
| 1 year all Fluids (TC) | $12.49 | per year |
| Decoder Enabling | $1.49 | one-time |


### Safe Sky

[App page](https://appshunter.io/ios/app/safe-sky-airside-sync/id1459357551)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Winter OPS free?

Winter OPS is free to download, with in-app purchases available.

### Is Safe Sky free?

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

### Do Winter OPS or Safe Sky have ads?

Neither Winter OPS nor Safe Sky shows ads.

### Which is updated more often, Winter OPS or Safe Sky?

Winter OPS ships an update every 8 months, and Safe Sky every 6 weeks. Most recently, Winter OPS was updated on September 12, 2026 and Safe Sky on September 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*