# NN Clock vs Big Clock

The clearest difference is review sentiment: NN Clock at 77% against Big Clock's 0%. NN Clock also leads on in-app purchases (none vs 3) and ads (none vs shown). Big Clock's advantage is update cadence (every 3 months vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Big Clock sells 3 in-app purchases, starting at $4.99 per 7 days. NN Clock asks for nothing beyond the download.

NN Clock holds the better App Store score, 3.8 against 3.3. That said, the two scores are not equally well evidenced: NN Clock has 36 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 77% of NN Clock's written reviews are positive against 0% of Big Clock's.

NN Clock ships an update every 6 months, Big Clock every 3 months. The most recent releases landed on October 22, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | NN Clock | Big Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (36 ratings)](https://appshunter.io/ios/app/nn-clock/id510453998/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/big-clock-digital-display/id1553856417/reviews) |
| Number of ratings | **36** | 3 |
| Positive reviews | **76.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | **Free** | Ad-supported |
| Size | 7 MB | 66 MB |
| Requires iOS | **6.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jon Juhl Nørrelykke](https://appshunter.io/developer/495299670) | [Kevin Ghori](https://appshunter.io/developer/1639082610) |

## What reviewers say

### NN Clock

[App page](https://appshunter.io/ios/app/nn-clock/id510453998)

This application offers a straightforward and powerful alarm clock experience with an elegant analog interface. It simplifies alarm setting and management, allowing for custom wake-up sounds and background changes. The app also integrates with HealthKit for sleep tracking.

**Highlights:** Set alarms by moving alarm hand, Swipe to dismiss alarms, Start timer by turning ring, Customizable background images, HealthKit sleep registration, 8 built-in alarm sounds, Music library integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Big Clock

[App page](https://appshunter.io/ios/app/big-clock-digital-display/id1553856417)

This utility app displays the current day, time, and date in a large, full-screen digital format. It offers customization options for clock digit color and includes integrated alarm, timer, and stopwatch functionalities with advanced settings like repetition and lap tracking.

**Highlights:** Full-screen digital clock display, Customizable digit colors, Multiple alarm settings, Countdown timer, Stopwatch with lap feature, Display day and date

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Big Digital Clock Weekly Plan | $4.99 | per 7 days |
| Big Digital Clock Monthly Plan | $9.99 | per month |
| Big Digital Clock Yearly Plan | $49.99 | per year |


## Frequently asked questions

### Is NN Clock free?

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

### Is Big Clock free?

Big Clock is free to download, with in-app purchases available.

### Which has better reviews, NN Clock or Big Clock?

NN Clock is rated higher. NN Clock averages 3.8 out of 5 from 36 ratings, while Big Clock averages 3.3 from 3 ratings.

### Do NN Clock or Big Clock have ads?

Big Clock shows ads; NN Clock does not.

### Which is updated more often, NN Clock or Big Clock?

NN Clock ships an update every 6 months, and Big Clock every 3 months. Most recently, NN Clock was updated on October 22, 2026 and Big Clock on October 3, 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.*