# SD Mini vs Big Clock

The clearest difference is review sentiment: Big Clock at 100% against SD Mini's 0%. Big Clock also leads on rating (4.7 vs 4.0) and update cadence (weekly vs every 3 months). SD Mini's advantage is in-app purchases (none vs 4) and iOS requirement (8.0 vs 16.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Big Clock sells 4 one-off in-app purchases. SD Mini asks for nothing beyond the download.

Big Clock holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 0% of SD Mini's written reviews are positive against 100% of Big Clock's.

SD Mini ships an update every 3 months, Big Clock weekly. Both last shipped on October 14, 2026.

## The numbers

| Metric | SD Mini | Big Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/sd-mini/id1441934004/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/big-clock-always-on-display/id6760553772/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 69 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Maxwell Forest Pty Ltd](https://appshunter.io/developer/393051070) | [Nataliia Zarudna](https://appshunter.io/developer/1871489027) |

## What reviewers say

### SD Mini

[App page](https://appshunter.io/ios/app/sd-mini/id1441934004)

This app helps you keep track of your belongings using a Bluetooth tracker. It alerts you if you leave an item behind and can help you locate it by showing its last known position on a map or by triggering a sound alert.

**Highlights:** Item tracking via Bluetooth, Left-behind alerts, Last known location mapping, Sound alerts for item location, Selfie capture functionality

**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 (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | one-time |
| Premium + Coffee | $3.99 | one-time |
| Premium + Coffee + Croissant | $7.99 | one-time |
| Premium + Big Support | $12.99 | one-time |


## Frequently asked questions

### Is SD Mini free?

SD Mini 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, SD Mini or Big Clock?

Big Clock is rated higher. SD Mini averages 4.0 out of 5 from 4 ratings, while Big Clock averages 4.7 from 6 ratings.

### Do SD Mini or Big Clock have ads?

Neither SD Mini nor Big Clock shows ads.

### Which is updated more often, SD Mini or Big Clock?

SD Mini ships an update every 3 months, and Big Clock weekly. Most recently, SD Mini was updated on October 14, 2026 and Big Clock on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*