# HAL vs BTTF Clock

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.

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

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.

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.

## The numbers

| Metric | HAL | BTTF Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (11 ratings)](https://appshunter.io/ios/app/hal-voice-ai-assistant/id6447562599/reviews) | **[4.6 (31 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews)** |
| Number of ratings | 11 | **31** |
| Positive reviews | 0.0% of reviews | **84.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 35 MB | 75 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [yu nakamura](https://appshunter.io/developer/1079316668) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### HAL

[App page](https://appshunter.io/ios/app/hal-voice-ai-assistant/id6447562599)

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:** 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 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*