# Slydr Timer vs Thunderstorm Simulator (w/Ads)

The clearest difference is ads: Slydr Timer at none against Thunderstorm Simulator (w/Ads)'s shown. Slydr Timer also leads on rating (5.0 vs 4.6) and monetization model (free vs ad-supported). Thunderstorm Simulator (w/Ads)'s advantage is update cadence (every 4 months vs every 22 months) and ratings volume (12 vs 1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Slydr Timer holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Thunderstorm Simulator (w/Ads) has 12 ratings behind it against 1, so its average is the more settled of the two.

Slydr Timer ships an update every 22 months, Thunderstorm Simulator (w/Ads) every 4 months. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Slydr Timer | Thunderstorm Simulator (w/Ads) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/slydr-timer/id1350285643/reviews)** | [4.6 (12 ratings)](https://appshunter.io/ios/app/thunderstorm-simulator-wads/id1482707561/reviews) |
| Number of ratings | 1 | **12** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 22 months | **Every 4 months** |
| Monetization | **Free** | Ad-supported |
| Size | 9 MB | 75 MB |
| Requires iOS | **10.3** | 15.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Beyond Confident Labs LLC](https://appshunter.io/developer/1079292911) | [Scott Dodson](https://appshunter.io/developer/1033778296) |

## What reviewers say

### Slydr Timer

[App page](https://appshunter.io/ios/app/slydr-timer/id1350285643)

This app helps you master focus techniques like the Pomodoro Technique with customizable work and break intervals. Its sleek design and intuitive controls make it easy to track progress and stay motivated. Personalize your experience with new color themes.

**Highlights:** Pomodoro Technique timer, Customizable work/break intervals, Sleek and intuitive design, Progress tracking, Vibrant color themes

**Features:** macOS Compatibility

**In-app purchases:** none


### Thunderstorm Simulator (w/Ads)

[App page](https://appshunter.io/ios/app/thunderstorm-simulator-wads/id1482707561)

Create a personalized thunderstorm experience to aid relaxation and sleep. Customize rain intensity, thunder frequency, lightning effects, and background sounds. Includes a sleep timer with audio fade-out.

**Highlights:** Customizable thunderstorm types, Adjustable rain and thunder sounds, Toggleable lightning effects, Background ambient sounds, Sleep timer with fade-out, Bluetooth and AirPlay support

**In-app purchases:** none


## Frequently asked questions

### Is Slydr Timer free?

Slydr Timer is free to download, with no in-app purchases.

### Is Thunderstorm Simulator (w/Ads) free?

Thunderstorm Simulator (w/Ads) is free to download, with no in-app purchases.

### Which has better reviews, Slydr Timer or Thunderstorm Simulator (w/Ads)?

Slydr Timer is rated higher. Slydr Timer averages 5.0 out of 5 from 1 ratings, while Thunderstorm Simulator (w/Ads) averages 4.6 from 12 ratings.

### Do Slydr Timer or Thunderstorm Simulator (w/Ads) have ads?

Thunderstorm Simulator (w/Ads) shows ads; Slydr Timer does not.

### Which is updated more often, Slydr Timer or Thunderstorm Simulator (w/Ads)?

Slydr Timer ships an update every 22 months, and Thunderstorm Simulator (w/Ads) every 4 months. Most recently, Slydr Timer was updated on October 15, 2026 and Thunderstorm Simulator (w/Ads) on October 9, 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.*