# SENS motion vs Unseen Bio

The clearest difference is update cadence: SENS motion at every 6 weeks against Unseen Bio's every 12 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SENS motion ships an update every 6 weeks, Unseen Bio every 12 months. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | SENS motion | Unseen Bio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 12 months |
| Size | 99 MB | 30 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sens Innovation ApS](https://appshunter.io/developer/1324585859) | [Unseen Biometrics ApS](https://appshunter.io/developer/1657718298) |

## What reviewers say

### SENS motion

[App page](https://appshunter.io/ios/app/sens-motion/id998363471)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unseen Bio

[App page](https://appshunter.io/ios/app/unseen-bio/id6444896397)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SENS motion free?

SENS motion is free to download, with no in-app purchases.

### Is Unseen Bio free?

Unseen Bio is free to download, with no in-app purchases.

### Do SENS motion or Unseen Bio have ads?

Neither SENS motion nor Unseen Bio shows ads.

### Which is updated more often, SENS motion or Unseen Bio?

SENS motion ships an update every 6 weeks, and Unseen Bio every 12 months. Most recently, SENS motion was updated on October 14, 2026 and Unseen Bio on October 15, 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.*