# Kircubbin IPS vs smart_r

The clearest difference is in-app purchases: Kircubbin IPS at none against smart_r's 15. Kircubbin IPS also leads on iOS requirement (11.0 vs 15.6). smart_r's advantage is update cadence (every 4 weeks vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. smart_r sells 15 in-app purchases, starting at $1.99 per month. Kircubbin IPS asks for nothing beyond the download.

Kircubbin IPS ships an update every 5 months, smart_r every 4 weeks. The most recent releases landed on December 27, 2025 and June 1, 2026 respectively.

## The numbers

| Metric | Kircubbin IPS | smart_r |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 weeks** |
| Size | 43 MB | 48 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BUSINESS SYSTEM SOLUTIONS (N.I.) LTD](https://appshunter.io/developer/549288322) | [SMART-R TECHNOLOGY LIMITED](https://appshunter.io/developer/1810160388) |

## What reviewers say

### Kircubbin IPS

[App page](https://appshunter.io/ios/app/kircubbin-ips/id1455034317)

**Features:** macOS Compatibility

**In-app purchases:** none


### smart_r

[App page](https://appshunter.io/ios/app/smart-r/id6744962652)

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

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthlyplan | $1.99 | per month |
| all topic discount 4 | Free | one-time |
| Gems50 | $0.49 | one-time |
| all topic discount 3 | $0.99 | one-time |
| gems150 | $0.99 | one-time |
| geometry topic | $2.99 | one-time |
| number topic | $2.99 | one-time |
| probability topic | $2.99 | one-time |
| ratio topic | $2.99 | one-time |
| stats topic | $2.99 | one-time |
| gems500 | $2.99 | one-time |
| all topic discount 2 | $3.99 | one-time |
| SeasonPass | $3.99 | one-time |
| all topic discount 1 | $6.99 | one-time |
| all topics | $10.00 | one-time |


## Frequently asked questions

### Is Kircubbin IPS free?

Kircubbin IPS is free to download, with no in-app purchases.

### Is smart_r free?

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

### Do Kircubbin IPS or smart_r have ads?

Neither Kircubbin IPS nor smart_r shows ads.

### Which is updated more often, Kircubbin IPS or smart_r?

Kircubbin IPS ships an update every 5 months, and smart_r every 4 weeks. Most recently, Kircubbin IPS was updated on December 27, 2025 and smart_r on June 1, 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.*