# RAD Study vs Bolster Research Study

The clearest difference is update cadence: RAD Study at every 3 weeks against Bolster Research Study's every 3 months. Bolster Research Study's advantage is iOS requirement (13.0 vs 16.0). 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.

RAD Study ships an update every 3 weeks, Bolster Research Study every 3 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | RAD Study | Bolster Research Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 51 MB | 40 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Avicenna Research Inc.](https://appshunter.io/developer/1137173051) | [Benjamin Buck](https://appshunter.io/developer/1649651898) |

## What reviewers say

### RAD Study

[App page](https://appshunter.io/ios/app/rad-study/id6445949197)

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

**In-app purchases:** none


### Bolster Research Study

[App page](https://appshunter.io/ios/app/bolster-research-study/id6446148642)

**In-app purchases:** none


## Frequently asked questions

### Is RAD Study free?

RAD Study is free to download, with no in-app purchases.

### Is Bolster Research Study free?

Bolster Research Study is free to download, with no in-app purchases.

### Do RAD Study or Bolster Research Study have ads?

Neither RAD Study nor Bolster Research Study shows ads.

### Which is updated more often, RAD Study or Bolster Research Study?

RAD Study ships an update every 3 weeks, and Bolster Research Study every 3 months. Most recently, RAD Study was updated on November 3, 2026 and Bolster Research Study on October 27, 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.*