# R2 vs BTTF Clock

R2 and BTTF Clock both sit at 4.6 stars, but that hides the real split: 83% of BTTF Clock's written reviews are positive against 25% of R2's. R2's advantage is update cadence (every 11 days vs every 2 months) and iOS requirement (11.0 vs 15.6). 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 — 4.6 for R2 against 4.6 for BTTF Clock. Both are backed by a comparable volume of ratings — 10 and 28 respectively. Written reviews are what separate them: 25% of R2's written reviews are positive against 83% of BTTF Clock's.

R2 ships an update every 11 days, BTTF Clock every 2 months. The most recent releases landed on September 10, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | R2 | BTTF Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/r2-d2-vocalizer/id1579187620/reviews) | **[4.6 (28 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews)** |
| Number of ratings | 10 | **28** |
| Positive reviews | 25.0% of reviews | **82.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 171 MB | 64 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Perl](https://appshunter.io/developer/1579187622) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### R2

[App page](https://appshunter.io/ios/app/r2-d2-vocalizer/id1579187620)

This app generates unique R2-D2 vocalizations based on emotional stimuli or custom scripts. Its AI analyzes R2-D2's personality and speech patterns to create authentic-sounding beeps and whistles.

**Highlights:** AI-powered R2-D2 vocalizations, Emotional stimulus buttons, Script panel for manual creation, Grammatical AI recommendations, Store and recall custom vocalizations, Unique sound generation algorithm

**Features:** macOS Compatibility

**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 R2 free?

R2 is free to download, with no in-app purchases.

### Is BTTF Clock free?

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

### Which has better reviews, R2 or BTTF Clock?

BTTF Clock is rated higher. R2 averages 4.6 out of 5 from 10 ratings, while BTTF Clock averages 4.6 from 28 ratings.

### Do R2 or BTTF Clock have ads?

Neither R2 nor BTTF Clock shows ads.

### Which is updated more often, R2 or BTTF Clock?

R2 ships an update every 11 days, and BTTF Clock every 2 months. Most recently, R2 was updated on September 10, 2026 and BTTF Clock on September 13, 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.*