# Smart Sensor 4.0 vs SeaTime Tracker

The clearest difference is in-app purchases: Smart Sensor 4.0 at none against SeaTime Tracker's 4. Smart Sensor 4.0 also leads on iOS requirement (8.0 vs 15.1). SeaTime Tracker's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. SeaTime Tracker sells 4 in-app purchases, starting at $5.99 per month. Smart Sensor 4.0 asks for nothing beyond the download.

Smart Sensor 4.0 ships an update every 3 months, SeaTime Tracker weekly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Smart Sensor 4.0 | SeaTime Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 77 MB | 45 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Infinite Uptime India Pvt Ltd](https://appshunter.io/developer/1511466684) | [Foreland Marine Consultancy Ltd.](https://appshunter.io/developer/1870246618) |

## What reviewers say

### Smart Sensor 4.0

[App page](https://appshunter.io/ios/app/smart-sensor-40/id1511517119)

**Features:** macOS Compatibility

**In-app purchases:** none


### SeaTime Tracker

[App page](https://appshunter.io/ios/app/seatime-tracker-crew-logbook/id6758010893)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $5.99 | per month |
| Annual Subscription | $49.99 | per year |
| Up to 6 months of history | $9.39 | one-time |
| Up to 12 months of history | $19.99 | one-time |


## Frequently asked questions

### Is Smart Sensor 4.0 free?

Smart Sensor 4.0 is free to download, with no in-app purchases.

### Is SeaTime Tracker free?

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

### Do Smart Sensor 4.0 or SeaTime Tracker have ads?

Neither Smart Sensor 4.0 nor SeaTime Tracker shows ads.

### Which is updated more often, Smart Sensor 4.0 or SeaTime Tracker?

Smart Sensor 4.0 ships an update every 3 months, and SeaTime Tracker weekly. Most recently, Smart Sensor 4.0 was updated on October 25, 2026 and SeaTime Tracker on October 28, 2026.

---

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