# Marble vs Tanning Timer

The clearest difference is in-app purchases: Marble at none against Tanning Timer's 3. Marble also leads on update cadence (every 9 days vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Tanning Timer sells 3 in-app purchases, starting at $6.99 per 7 days. Marble asks for nothing beyond the download.

Marble ships an update every 9 days, Tanning Timer monthly. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Marble | Tanning Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/marble-ai-journaling-guide/id6479338137/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Free | — |
| Size | 75 MB | 18 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Matthew Walter](https://appshunter.io/developer/1689854411) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Marble

[App page](https://appshunter.io/ios/app/marble-ai-journaling-guide/id6479338137)

This app offers a guided journaling experience with voice and text input. It helps users track mood and sleep, cultivate gratitude, and connect with a coach for personalized support and insights.

**Highlights:** Voice and text journaling, Coach connection, Insightful reflections, Daily gratitude practices, Sleep and mood tracking, Notes and photo uploads

**Features:** macOS Compatibility

**In-app purchases:** none


### Tanning Timer

[App page](https://appshunter.io/ios/app/tanning-timer-uv-sun-tracker/id6767789918)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $6.99 | per 7 days |
| Annual Premium | $34.99 | per year |
| Lifetime Premium | $69.99 | one-time |


## Frequently asked questions

### Is Marble free?

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

### Is Tanning Timer free?

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

### Do Marble or Tanning Timer have ads?

Neither Marble nor Tanning Timer shows ads.

### Which is updated more often, Marble or Tanning Timer?

Marble ships an update every 9 days, and Tanning Timer monthly. Most recently, Marble was updated on October 7, 2026 and Tanning Timer on October 24, 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.*