Comparison

Simple Sinus Zazen Timer vs Serene Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simple Sinus Zazen Timer

Features
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This timer gives you the ability to set up your zazen-time and a preparation-time before. The signals are generated by a simple sinus-wave. So, you get a real digital tone as a signal not a sample of a singing bowl or something else. Take this signal to act, to meditate or to open and close your sitting by tapping your own singing-bowl. The signals and times may be varied to your needs. The App may run in background or locked device, so the energy consumption is very low.

About

Serene Timer

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
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Tired of timers that shock you awake? Serene Timer offers a kinder, calmer way to wake up, perfect for meditation, naps, and relaxation. With sounds that gradually ramp up in volume, Serene Timer gently eases you back into alertness, leaving you refreshed and centered instead of startled. Whether you need a soft wake-up after a power nap or a gentle end to your meditation, Serene Timer is designed to support your wellness. No harsh tones, no jolts—just a smooth, tranquil rise that fits seamlessly into your routine. Discover the peaceful alternative to abrupt alarms.

Screenshots

Simple Sinus Zazen Timer4 screens
Serene Timer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard1 real difference · 9 level
Simple Sinus Zazen Timer versus Serene Timer: the parameters behind the verdict, then further details
ParameterSimple Sinus Zazen TimerSerene Timer
Price$0.99Free — better
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 11 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad — betteriPhone
Requires iOS16.6 — better17.5
Further details — not scored
Size1 MB35 MB
Age rating4+4+
DeveloperDirk ScheidtSebastian Ruhleder

In-app purchases

None

Simple Sinus Zazen Timer

No in-app purchases

None

Serene Timer

No in-app purchases

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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