# Simple Sinus Zazen Timer vs Serene Timer

The clearest difference is price: Serene Timer at Free against Simple Sinus Zazen Timer's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Serene Timer is free to download; Simple Sinus Zazen Timer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Simple Sinus Zazen Timer ships an update every 11 months, Serene Timer every 7 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Simple Sinus Zazen Timer | Serene Timer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/serene-timer/id6738510879/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 1 MB | 35 MB |
| Requires iOS | **16.6** | 17.5 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dirk Scheidt](https://appshunter.io/developer/1495649371) | [Sebastian Ruhleder](https://appshunter.io/developer/1781085513) |

## What reviewers say

### Simple Sinus Zazen Timer

[App page](https://appshunter.io/ios/app/simple-sinus-zazen-timer/id1495663488)

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

**In-app purchases:** none


### Serene Timer

[App page](https://appshunter.io/ios/app/serene-timer/id6738510879)

This app provides a gentle and calm way to wake up or end meditation sessions. It uses sounds that gradually increase in volume, easing you into alertness without startling you. Ideal for naps and relaxation, it promotes a refreshed and centered feeling.

**Highlights:** Gradually increasing sound volume, Gentle wake-up experience, Supports meditation and naps, Calm and tranquil soundscapes, No harsh tones or jolts

**In-app purchases:** none


## Frequently asked questions

### Is Simple Sinus Zazen Timer free?

Simple Sinus Zazen Timer costs $0.99, with no in-app purchases.

### Is Serene Timer free?

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

### Do Simple Sinus Zazen Timer or Serene Timer have ads?

Neither Simple Sinus Zazen Timer nor Serene Timer shows ads.

### Which is updated more often, Simple Sinus Zazen Timer or Serene Timer?

Simple Sinus Zazen Timer ships an update every 11 months, and Serene Timer every 7 months. Most recently, Simple Sinus Zazen Timer was updated on October 6, 2026 and Serene Timer on October 6, 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.*