# Earth Clock Plus vs BTTF Clock

The clearest difference is price: BTTF Clock at Free against Earth Clock Plus's $2.99. BTTF Clock also leads on update cadence (every 2 months vs every 29 months). Earth Clock Plus's advantage is iOS requirement (13 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

BTTF Clock is free to download; Earth Clock Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Earth Clock Plus ships an update every 29 months, BTTF Clock every 2 months. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Earth Clock Plus | BTTF Clock |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.6 (28 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | — | 82.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 21 MB | 64 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### Earth Clock Plus

[App page](https://appshunter.io/ios/app/earth-clock-plus/id1173124714)

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

**In-app purchases:** none


### BTTF Clock

[App page](https://appshunter.io/ios/app/bttf-clock/id6740161583)

Experience the magic of time travel with a digital recreation of the iconic DeLorean dashboard. This app features customizable date panels, real-time clock updates, and authentic sound effects from the "Back to the Future" trilogy. It's designed to run smoothly on older devices, bringing cinematic nostalgia to your phone or tablet.

**Highlights:** Iconic time display panels, Customizable destination, present, and last departed times, Real-time accurate clock, Interactive interface for date changes, Authentic movie sound effects, Optimized for older devices

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

**In-app purchases:** none


## Frequently asked questions

### Is Earth Clock Plus free?

Earth Clock Plus costs $2.99, with no in-app purchases.

### Is BTTF Clock free?

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

### Do Earth Clock Plus or BTTF Clock have ads?

Neither Earth Clock Plus nor BTTF Clock shows ads.

### Which is updated more often, Earth Clock Plus or BTTF Clock?

Earth Clock Plus ships an update every 29 months, and BTTF Clock every 2 months. Most recently, Earth Clock Plus was updated on September 23, 2026 and BTTF Clock on September 26, 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.*