# Q vs Red Alert

The clearest difference is price: Red Alert at Free against Q's $1.99. Red Alert also leads on in-app purchases (none vs 8). Q's advantage is iOS requirement (13.0 vs 15.1). On update cadence, ads and device support there is nothing between them.

Red Alert is free to download; Q costs $1.99 up front. Q sells 8 one-off in-app purchases. Red Alert asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Q | Red Alert |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Paid | — |
| Size | 8 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jeroen van Vianen](https://appshunter.io/developer/444290863) | [Stichting Trimbos-Instituut, Netherlands Institute of Mental Health and Addiction](https://appshunter.io/developer/667312395) |

## What reviewers say

### Q

[App page](https://appshunter.io/ios/app/q-tide/id623510370)

Access tide data for 60 inland locations in 2025, featuring tide charts and real-time graphs for yesterday, today, and tomorrow. Plan your activities with detailed information including 25 bridge clearances.

**Highlights:** 2025 tide levels for 60 locations, Tide charts based on RWS data, Real-time graphs for planning, Yesterday, today, and tomorrow data, 25 bridge clearances included

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Q-Tide 2023 update | Free | one-time |
| Update 2024 | Free | one-time |
| Update 2026 | Free | one-time |
| Update 2025 | Free | one-time |
| Q-Tide 2023 update | $1.99 | one-time |
| Update 2024 | $1.99 | one-time |
| Update 2026 | $2.99 | one-time |
| Update 2025 | $2.99 | one-time |


### Red Alert

[App page](https://appshunter.io/ios/app/red-alert/id1146850137)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Q free?

Q costs $1.99, and also offers in-app purchases.

### Is Red Alert free?

Red Alert is free to download, with no in-app purchases.

### Do Q or Red Alert have ads?

Neither Q nor Red Alert shows ads.

### Which is updated more often, Q or Red Alert?

Q ships an update every 4 months, and Red Alert every 4 months. Most recently, Q was updated on October 17, 2026 and Red Alert on October 12, 2026.

---

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