# TKZ Air Refresh vs Big Clock

The clearest difference is in-app purchases: TKZ Air Refresh at none against Big Clock's 7. TKZ Air Refresh also leads on iOS requirement (12.0 vs 16.0). Big Clock's advantage is update cadence (weekly vs every 21 months). On price, ads and device support there is nothing between them.

Both are free to download. Big Clock sells 7 one-off in-app purchases. TKZ Air Refresh asks for nothing beyond the download.

TKZ Air Refresh ships an update every 21 months, Big Clock weekly. The most recent releases landed on October 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TKZ Air Refresh | Big Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (6 ratings)](https://appshunter.io/ios/app/big-clock-always-on-display/id6760553772/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 39 MB | 74 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MedyaPlan](https://appshunter.io/developer/455741121) | [Nataliia Zarudna](https://appshunter.io/developer/1871489027) |

## What reviewers say

### TKZ Air Refresh

[App page](https://appshunter.io/ios/app/tkz-air-refresh/id1355873266)

**Features:** macOS Compatibility

**In-app purchases:** none


### Big Clock

[App page](https://appshunter.io/ios/app/big-clock-always-on-display/id6760553772)

Transform your device into a large, clear digital clock. Ideal for bedside tables, desks, or workouts, it offers an always-on display with customizable themes and brightness for easy readability in any environment.

**Highlights:** Fullscreen digital clock, Always-on display mode, Light and dark themes, Brightness control, Portrait and landscape support, Minimal design

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Support | $1.99 | one-time |
| Premium | $2.99 | one-time |
| Premium + Coffee | $4.99 | one-time |
| Coffee & Croissant Support | $5.99 | one-time |
| Premium + Coffee + Croissant | $8.99 | one-time |
| Big Support | $12.99 | one-time |
| Premium + Big Support | $14.99 | one-time |


## Frequently asked questions

### Is TKZ Air Refresh free?

TKZ Air Refresh is free to download, with no in-app purchases.

### Is Big Clock free?

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

### Do TKZ Air Refresh or Big Clock have ads?

Neither TKZ Air Refresh nor Big Clock shows ads.

### Which is updated more often, TKZ Air Refresh or Big Clock?

TKZ Air Refresh ships an update every 21 months, and Big Clock weekly. Most recently, TKZ Air Refresh was updated on October 3, 2026 and Big Clock on October 25, 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.*