# TRSS Reaction vs Holdover Time

The clearest difference is in-app purchases: TRSS Reaction at none against Holdover Time's 3. TRSS Reaction also leads on iOS requirement (13.0 vs 16.6). Holdover Time's advantage is update cadence (every 2 weeks vs every 2 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Holdover Time sells 3 in-app purchases, starting at $4.99 per year. TRSS Reaction asks for nothing beyond the download.

TRSS Reaction ships an update every 2 months, Holdover Time every 2 weeks. The most recent releases landed on June 25, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | TRSS Reaction | Holdover Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/holdover-time/id1600468704/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 50 MB | 2 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oryx Systems CC](https://appshunter.io/developer/966072104) | [Mohamed Farhadi](https://appshunter.io/developer/1191731876) |

## What reviewers say

### TRSS Reaction

[App page](https://appshunter.io/ios/app/trss-reaction/id1253495250)

This app acts as a panic button, instantly alerting a control room to dispatch emergency services like fire, armed response, or ambulance. It also serves as a comprehensive security management platform for testing alarms, managing access, and providing holiday instructions.

**Highlights:** Instant emergency dispatch, Panic button functionality, Security management platform, Alarm testing and management, User access control, Holiday instruction feature

**In-app purchases:** none


### Holdover Time

[App page](https://appshunter.io/ios/app/holdover-time/id1600468704)

Calculate essential deicing holdover times with the latest FAA guidelines for the 2025-2026 winter season. This tool provides accurate calculations for various fluid types and includes a real-time countdown timer for enhanced situational awareness.

**Highlights:** Up-to-date FAA Holdover Time Guidelines (2025-2026), Calculations for Fluid Types II, III, & IV, Customized notes for specific fluids, Intuitive interface for aviation professionals, Real-time Holdover Time Countdown Timer, Ad-free experience

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hold Over Time Calculator | $4.99 | per year |
| Hold Over Time Calculator | Free | one-time |
| Holdover Time - Life Time | $24.99 | one-time |


## Frequently asked questions

### Is TRSS Reaction free?

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

### Is Holdover Time free?

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

### Do TRSS Reaction or Holdover Time have ads?

Neither TRSS Reaction nor Holdover Time shows ads.

### Which is updated more often, TRSS Reaction or Holdover Time?

TRSS Reaction ships an update every 2 months, and Holdover Time every 2 weeks. Most recently, TRSS Reaction was updated on June 25, 2026 and Holdover Time on September 27, 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.*