# Zenith vs Carbon

The clearest difference is in-app purchases: Carbon at none against Zenith's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Zenith sells 2 in-app purchases, starting at $2.99 per month. Carbon asks for nothing beyond the download.

Zenith ships an update weekly, Carbon every 9 days. The most recent releases landed on October 28, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Zenith | Carbon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zenith-pomodoro-study-timer/id6770132700/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Monetization | Free with in-app purchases | — |
| Size | 210 MB | 2 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shahab Darvish](https://appshunter.io/developer/1896717914) | [BMP Research LLC](https://appshunter.io/developer/6798390657) |

## What reviewers say

### Zenith

[App page](https://appshunter.io/ios/app/zenith-pomodoro-study-timer/id6770132700)

This minimalist productivity app uses the Pomodoro technique with atmospheric visuals and calming breathing exercises to help you achieve deep work. Customize focus sessions, breaks, and choose immersive themes to create a digital sanctuary for enhanced concentration.

**Highlights:** Aesthetic focus with dynamic mesh backgrounds, Immersive themes for work ambiance, Customizable Pomodoro technique sessions, Integrated breathing exercises, Live Activities for progress tracking, Session tagging for focus insights

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per month |
| Premium Annual | $25.00 | per year |


### Carbon

[App page](https://appshunter.io/ios/app/carbon-calendar-mirror/id6800547558)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is Zenith free?

Zenith is free to download, with in-app purchases available.

### Is Carbon free?

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

### Do Zenith or Carbon have ads?

Neither Zenith nor Carbon shows ads.

### Which is updated more often, Zenith or Carbon?

Zenith ships an update weekly, and Carbon every 9 days. Most recently, Zenith was updated on October 28, 2026 and Carbon on October 10, 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.*