# Time Lock vs BTTF Clock

The clearest difference is price: BTTF Clock at Free against Time Lock's $0.99. BTTF Clock also leads on review sentiment (83% vs 40%) and rating (4.6 vs 2.8). Time Lock's advantage is iOS requirement (11.0 vs 15.6). On ratings volume, ads and device support there is nothing between them.

BTTF Clock is free to download; Time Lock costs $0.99 up front. Time Lock sells 1 one-off in-app purchase. BTTF Clock asks for nothing beyond the download.

BTTF Clock holds the better App Store score, 4.6 against 2.8. Both are backed by a comparable volume of ratings — 12 and 28 respectively. Written reviews point the same way: 40% of Time Lock's written reviews are positive against 83% of BTTF Clock's.

Time Lock ships an update every 10 months, BTTF Clock every 2 months. The most recent releases landed on August 17, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Time Lock | BTTF Clock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.8 (12 ratings)](https://appshunter.io/ios/app/time-lock-a-message-in-time/id1152048374/reviews) | **[4.6 (28 ratings)](https://appshunter.io/ios/app/bttf-clock/id6740161583/reviews)** |
| Number of ratings | 12 | **28** |
| Positive reviews | 40.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 26 MB | 64 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fanatic Development](https://appshunter.io/developer/488507501) | [Sergei Bazarnik](https://appshunter.io/developer/1722100966) |

## What reviewers say

### Time Lock

[App page](https://appshunter.io/ios/app/time-lock-a-message-in-time/id1152048374)

Send messages that reveal themselves only at a specific time or for a limited duration. Enhance conversations with timed secrets or exclusive meeting details. It's a fun way to build anticipation and curiosity.

**Highlights:** Send timed messages, Set message visibility duration, Share secrets, Exclusive meeting details, iMessage integration, Send message reminders

**Features:** iMessage stickers

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Messages | Free | one-time |


### 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 Time Lock free?

Time Lock costs $0.99, and also offers in-app purchases.

### Is BTTF Clock free?

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

### Which has better reviews, Time Lock or BTTF Clock?

BTTF Clock is rated higher. Time Lock averages 2.8 out of 5 from 12 ratings, while BTTF Clock averages 4.6 from 28 ratings.

### Do Time Lock or BTTF Clock have ads?

Neither Time Lock nor BTTF Clock shows ads.

### Which is updated more often, Time Lock or BTTF Clock?

Time Lock ships an update every 10 months, and BTTF Clock every 2 months. Most recently, Time Lock was updated on August 17, 2026 and BTTF Clock on September 30, 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.*