Comparison

R2 vs BTTF Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

R2

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
Read full description

Generate unique, emotional R2-D2 vocalizations with the press of a button! The R2-D2 Vocalizer is a fully functional AI. The software is powered by advanced research into the speech patterns and emotional logic of R2-D2. Press an emotional stimulus button and R2 will respond. His emotions will shift based on R2’s actual personality. He will then vocalize his new emotions. Each vocalization is unique. A sophisticated algorithm assembles R2’s speech "syllable" by "syllable." Billions upon billions of rules dictate how each sound should be selected, processed, timed, and sequenced to achieve emotional and canonical accuracy. For more control, use the Script panel to create a vocalization manually. The software's grammatical AI provides canonically-appropriate recommendations to guide you towards a coherent vocalization. Then store your custom vocalization to memory where it can be recalled either verbatim or with organic, AI-powered variation. This software is entirely free and contains no advertisements or in-app purchases. For more information on the Human-Cyborg Relations project, please visit humancyborgrelations.com

About

BTTF Clock

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
Read full description

Relive the magic of time travel with the BTTF Clock! Inspired by the iconic clock from the "Back to the Future" trilogy, this app brings the excitement of the DeLorean's dashboard right to your device. Whether you're using a phone or tablet you can enjoy the nostalgia of the iconic time machine. Best of all, it's optimized to run smoothly even on outdated devices, so no one gets left behind in the past. Key Features: • Iconic Time Display: Experience the legendary "Destination Time," "Present Time," and "Last Time Departed" panels, faithfully recreated with stunning detail. • Customizable Dates: Set your own dates for each panel and watch as the app mimics the flux capacitor's data changes. • Real-time Clock: Always stay on schedule with the accurate present time display. • Interactive Interface: Tap on the clock panels to change dates and relive the thrill of setting your time travel destination. • Sound Effects: Enjoy authentic sound effects from the movie to enhance your time travel experience. • Car Mode: Combine the Time Circuits, flux capacitor, and GPS speedometer in an immersive dashboard. • Manual Speed Simulation: Press and hold the speedometer to accelerate and feel speed-responsive haptic feedback as you approach the selected time-travel speed. • Cinematic Time Travel: Reach the configured speed to trigger a full-screen time-travel sequence with visual transitions and sound effects. • Home Screen and CarPlay Widget: Keep the Time Circuits visible at a glance with a configurable widget for your Home Screen and CarPlay. • Optimized for Outdated Devices: Designed to run efficiently on older devices, ensuring smooth performance without compromising on features. Target Audience: • Fans of the "Back to the Future" trilogy. • Retro and classic movie enthusiasts. • Anyone who enjoys unique and themed timekeeping apps. • Users with older devices seeking fun and functional apps.

Screenshots

R24 screens
BTTF Clock4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
R2 versus BTTF Clock: the parameters behind the verdict, then further details
ParameterR2BTTF Clock
PriceFreeFree
Rating4.6 (10 ratings)4.6 (28 ratings) — better
Positive reviews25.0% of reviews82.6% of reviews — better
Number of ratings1028 — better
Update frequencyEvery 11 days — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.6
Further details — not scored
Size171 MB64 MB
Age rating4+4+
DeveloperMichael PerlSergei Bazarnik

Customer experience

R2

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

BTTF Clock

All ratings28 ratings
Positive92.9%
Neutral3.6%
Negative3.6%
Written reviews23 reviews
Positive82.6%
Neutral8.7%
Negative8.7%

In-app purchases

None

R2

No in-app purchases

None

BTTF Clock

No in-app purchases

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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