# Intervi vs Killer Math

The clearest difference is in-app purchases: Killer Math at none against Intervi's 5. Intervi's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Intervi sells 5 in-app purchases, starting at $7.99 per month. Killer Math asks for nothing beyond the download.

Intervi ships an update weekly, Killer Math every 4 days. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Intervi | Killer Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 4 days** |
| Size | 39 MB | 46 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Donghyeon Kim](https://appshunter.io/developer/1714636468) | [CHUL HYUN LEE](https://appshunter.io/developer/297999549) |

## What reviewers say

### Intervi

[App page](https://appshunter.io/ios/app/intervi/id6746072638)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pass | $7.99 | per month |
| Intervi Package 1 | $0.99 | one-time |
| Intervi Package 2 | $1.99 | one-time |
| Intervi Package 3 | $4.99 | one-time |
| Intervi Package 4 | $9.99 | one-time |


### Killer Math

[App page](https://appshunter.io/ios/app/killer-math/id6785559161)

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

**In-app purchases:** none


## Frequently asked questions

### Is Intervi free?

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

### Is Killer Math free?

Killer Math is free to download, with no in-app purchases.

### Do Intervi or Killer Math have ads?

Both Intervi and Killer Math show ads.

### Which is updated more often, Intervi or Killer Math?

Intervi ships an update weekly, and Killer Math every 4 days. Most recently, Intervi was updated on October 15, 2026 and Killer Math on October 18, 2026.

---

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