Comparison

HAL 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

HAL

Engage in voice-activated conversations with an AI assistant that mimics sci-fi characters. Enjoy jokes, small talk, and get advice for various situations. Future updates aim to improve memory and accuracy.

Highlights
  • Voice input for immediate conversation
  • AI-powered jokes and small talk
  • Assistance with research and advice
  • Sci-fi movie-like AI interaction
  • Free to use
Features
Read full description

"HAL: Voice AI Assistant" is a free AI chat application that utilizes OpenAI's Chat API, allowing you to converse with an AI like those in sci-fi movies right on your smartphone. Easily usable with voice input alone, and it's free! Upon opening the app, voice input starts immediately, allowing you to casually ask questions or engage in conversation. The app's greatest charm is the AI's ability to tell jokes and have enjoyable small talk. Providing fun moments filled with laughter, just like conversations with friends and family. Moreover, it excels in various situations, such as research, love advice, or casual chats when bored. The current app has weaknesses like being unable to remember interactions or the AI conveying incorrect information. However, upcoming updates aim to resolve these issues. Experience a sci-fi movie-like future in the palm of your hand with "HAL: Voice AI Assistant" Look forward to its further evolution as a fun and convenient app.

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

HAL3 screens
BTTF Clock4 screens

Verdict

The call

The clearest difference is review sentiment: BTTF Clock at 84% against HAL's 0%. BTTF Clock also leads on rating (4.6 vs 3.5) and ads (none vs shown). HAL's advantage is iOS requirement (11.0 vs 15.6). On price, ratings volume, update cadence and in-app purchases 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

BTTF Clock holds the better App Store score, 4.6 against 3.5. Both are backed by a comparable volume of ratings — 11 and 31 respectively. Written reviews point the same way: 0% of HAL's written reviews are positive against 84% of BTTF Clock's.

UpkeepUpdate frequency

HAL ships an update every 2 months, BTTF Clock every 6 weeks. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
HAL versus BTTF Clock: the parameters behind the verdict, then further details
ParameterHALBTTF Clock
PriceFreeFree
Rating3.5 (11 ratings)4.6 (31 ratings) — better
Positive reviews0.0% of reviews84.0% of reviews — better
Number of ratings1131 — better
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better15.6
Further details — not scored
Size35 MB75 MB
Age rating17+4+
Developeryu nakamuraSergei Bazarnik

Customer experience

HAL

All ratings11 ratings
Positive63.6%
Neutral0.0%
Negative36.4%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

BTTF Clock

All ratings31 ratings
Positive93.5%
Neutral3.2%
Negative3.2%
Written reviews25 reviews
Positive84.0%
Neutral8.0%
Negative8.0%

In-app purchases

None

HAL

No in-app purchases

None

BTTF Clock

No in-app purchases

Questions

Is HAL free?
HAL 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, HAL or BTTF Clock?
BTTF Clock is rated higher. HAL averages 3.5 out of 5 from 11 ratings, while BTTF Clock averages 4.6 from 31 ratings.
Do HAL or BTTF Clock have ads?
HAL shows ads; BTTF Clock does not.
Which is updated more often, HAL or BTTF Clock?
HAL ships an update every 2 months, and BTTF Clock every 6 weeks. Most recently, HAL was updated on October 5, 2026 and BTTF Clock on October 13, 2026.

Other comparisons