# 00 vs Serene Timer

The clearest difference is update cadence: 00 at daily against Serene Timer's every 7 months. 00 also leads on iOS requirement (10.0 vs 17.5). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for 00 against 5.0 for Serene Timer. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

00 ships an update daily, Serene Timer every 7 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | 00 | Serene Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/0037/id1441908337/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/serene-timer/id6738510879/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 7 months |
| Monetization | Free | Free |
| Size | 28 MB | 35 MB |
| Requires iOS | **10.0** | 17.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Adriaan de Jongh](https://appshunter.io/developer/965628077) | [Sebastian Ruhleder](https://appshunter.io/developer/1781085513) |

## What reviewers say

### 00

[App page](https://appshunter.io/ios/app/0037/id1441908337)

This workout tool allows you to create custom exercise routines with timers, reminders, and notes. Track your progress by saving sessions and viewing your improvements over time. It's a free, personal project designed for users who know their own exercises.

**Highlights:** Customizable exercise display, Metronome and reminder setup, Exercise tagging and notes, Create sets and routines, Save and track session progress

**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 00 free?

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

### Is Serene Timer free?

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

### Which has better reviews, 00 or Serene Timer?

00 and Serene Timer are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do 00 or Serene Timer have ads?

Neither 00 nor Serene Timer shows ads.

### Which is updated more often, 00 or Serene Timer?

00 ships an update daily, and Serene Timer every 7 months. Most recently, 00 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.*