# QRCodeClock vs BTTF Clock

The clearest difference is update cadence: BTTF Clock at every 2 months against QRCodeClock's every 63 months. BTTF Clock also leads on ratings volume (28 vs 3). QRCodeClock's advantage is rating (5.0 vs 4.6) and review sentiment (100% vs 83%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

QRCodeClock holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: BTTF Clock has 28 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of QRCodeClock's written reviews are positive against 83% of BTTF Clock's.

QRCodeClock ships an update every 63 months, BTTF Clock every 2 months. The most recent releases landed on June 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | QRCodeClock | BTTF Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/qrcodeclock/id601461609/reviews)** | [4.6 (28 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews) |
| Number of ratings | 3 | **28** |
| Positive reviews | **100.0% of reviews** | 82.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 63 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 0 MB | 64 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jeff Menter](https://appshunter.io/developer/403539646) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### QRCodeClock

[App page](https://appshunter.io/ios/app/qrcodeclock/id601461609)

This application displays the current time encoded as a QR code. It prevents your device from sleeping while active and updates the QR code every second. It is designed for iOS devices and is free to download.

**Highlights:** Displays time as QR code, Prevents device sleep, Updates every second, iOS 5.0+ compatible, Free to download

**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 QRCodeClock free?

QRCodeClock 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, QRCodeClock or BTTF Clock?

QRCodeClock is rated higher. QRCodeClock averages 5.0 out of 5 from 3 ratings, while BTTF Clock averages 4.6 from 28 ratings.

### Do QRCodeClock or BTTF Clock have ads?

Neither QRCodeClock nor BTTF Clock shows ads.

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

QRCodeClock ships an update every 63 months, and BTTF Clock every 2 months. Most recently, QRCodeClock was updated on June 5, 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.*