# Rad IQ vs Curvia

The clearest difference is update cadence: Curvia at every 4 days against Rad IQ's every 132 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Rad IQ sells 3 one-off in-app purchases and Curvia sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Rad IQ ships an update every 132 months, Curvia every 4 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Rad IQ | Curvia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 132 months | **Every 4 days** |
| Size | 15 MB | 9 MB |
| Requires iOS | 16.2 | **16.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Horatiu Rosca](https://appshunter.io/developer/591298745) | [rainwe games Co., Ltd.](https://appshunter.io/developer/1796960010) |

## What reviewers say

### Rad IQ

[App page](https://appshunter.io/ios/app/rad-iq/id991608591)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extra Time | $0.99 | one-time |
| Unlock Categories | $0.99 | one-time |
| Unlimited Questions | $1.99 | one-time |


### Curvia

[App page](https://appshunter.io/ios/app/curvia/id6783280425)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Curvia Pro | $2.99 | one-time |


## Frequently asked questions

### Is Rad IQ free?

Rad IQ is free to download, with in-app purchases available.

### Is Curvia free?

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

### Do Rad IQ or Curvia have ads?

Neither Rad IQ nor Curvia shows ads.

### Which is updated more often, Rad IQ or Curvia?

Rad IQ ships an update every 132 months, and Curvia every 4 days. Most recently, Rad IQ was updated on October 19, 2026 and Curvia on October 24, 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.*