# Custom Digital Clock vs NibbleCalc

The clearest difference is in-app purchases: Custom Digital Clock at none against NibbleCalc's 1. Custom Digital Clock also leads on iOS requirement (15.1 vs 18.0). NibbleCalc's advantage is update cadence (every 5 weeks vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. NibbleCalc sells 1 one-off in-app purchase. Custom Digital Clock asks for nothing beyond the download.

Custom Digital Clock ships an update every 9 months, NibbleCalc every 5 weeks. The most recent releases landed on July 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Custom Digital Clock | NibbleCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/custom-digital-clock/id6476612907/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 29 MB | 9 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [tadashi endo](https://appshunter.io/developer/1605441215) | [LiChuan Lin](https://appshunter.io/developer/1895785594) |

## What reviewers say

### Custom Digital Clock

[App page](https://appshunter.io/ios/app/custom-digital-clock/id6476612907)

Display a stylish digital clock on your smartphone. Personalize the clock's appearance with custom coloring options to match your style.

**Highlights:** Stylish digital clock display, Customizable coloring, Smartphone integration, Personalized appearance

**Features:** macOS Compatibility

**In-app purchases:** none


### NibbleCalc

[App page](https://appshunter.io/ios/app/nibblecalc-dev-calculator/id6765700593)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Custom Digital Clock free?

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

### Is NibbleCalc free?

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

### Do Custom Digital Clock or NibbleCalc have ads?

Both Custom Digital Clock and NibbleCalc show ads.

### Which is updated more often, Custom Digital Clock or NibbleCalc?

Custom Digital Clock ships an update every 9 months, and NibbleCalc every 5 weeks. Most recently, Custom Digital Clock was updated on July 10, 2026 and NibbleCalc on September 8, 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.*