# Bra Construction vs Immunity Science

Bra Construction and Immunity Science are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Bra Construction ships an update every 21 months, Immunity Science every 14 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Bra Construction | Immunity Science |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 14 months** |
| Size | 307 MB | 32 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Hong Kong Polytechnic University](https://appshunter.io/developer/442903588) | [Immunity Science, Inc.](https://appshunter.io/developer/1672160767) |

## What reviewers say

### Bra Construction

[App page](https://appshunter.io/ios/app/bra-construction/id1481535881)

**Features:** macOS Compatibility

**In-app purchases:** none


### Immunity Science

[App page](https://appshunter.io/ios/app/immunity-science/id1672160765)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bra Construction free?

Bra Construction is free to download, with no in-app purchases.

### Is Immunity Science free?

Immunity Science is free to download, with no in-app purchases.

### Do Bra Construction or Immunity Science have ads?

Neither Bra Construction nor Immunity Science shows ads.

### Which is updated more often, Bra Construction or Immunity Science?

Bra Construction ships an update every 21 months, and Immunity Science every 14 months. Most recently, Bra Construction was updated on October 14, 2026 and Immunity Science on October 19, 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.*