# big O'Clock vs DotDecoClock

The clearest difference is price: DotDecoClock at Free against big O'Clock's $0.99. DotDecoClock also leads on in-app purchases (none vs 3) and update cadence (monthly vs every 12 months). big O'Clock's advantage is ads (none vs shown). On device support there is nothing between them.

DotDecoClock is free to download; big O'Clock costs $0.99 up front. big O'Clock sells 3 one-off in-app purchases. DotDecoClock asks for nothing beyond the download.

big O'Clock ships an update every 12 months, DotDecoClock monthly. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | big O'Clock | DotDecoClock |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.5 (11 ratings)](https://appshunter.io/ios/app/big-oclock/id1524090504/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | Paid | — |
| Size | 31 MB | 73 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [john bogaert](https://appshunter.io/developer/1524090506) | [Haruya Ishiguro](https://appshunter.io/developer/1751808079) |

## What reviewers say

### big O'Clock

[App page](https://appshunter.io/ios/app/big-oclock/id1524090504)

A full-screen clock, timer, and stopwatch app featuring large, clear digits. It offers high-quality visuals, sounds, and vibrations, serving as a stylish nightstand or work clock.

**Highlights:** Full-screen display, Large, clear digits, Customizable sounds and vibrations, Timer functionality, Stopwatch functionality, Nightstand mode

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| I Love Big O'Clock | $1.99 | one-time |
| I Deeply Love Big O'Clock | $3.99 | one-time |
| I Adore Big O'Clock | $6.99 | one-time |


### DotDecoClock

[App page](https://appshunter.io/ios/app/dotdecoclock/id6504302932)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is big O'Clock free?

big O'Clock costs $0.99, and also offers in-app purchases.

### Is DotDecoClock free?

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

### Do big O'Clock or DotDecoClock have ads?

DotDecoClock shows ads; big O'Clock does not.

### Which is updated more often, big O'Clock or DotDecoClock?

big O'Clock ships an update every 12 months, and DotDecoClock monthly. Most recently, big O'Clock was updated on October 10, 2026 and DotDecoClock on October 6, 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.*