# R vs Calc Training (30sec)

The clearest difference is in-app purchases: R at none against Calc Training (30sec)'s 3. R also leads on ads (none vs shown) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Calc Training (30sec) sells 3 one-off in-app purchases. R asks for nothing beyond the download.

R ships an update every 6 weeks, Calc Training (30sec) monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | R | Calc Training (30sec) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (26 ratings)](https://appshunter.io/ios/app/r-store/id497299633/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | — | 72.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 92 MB | 8 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [R-STORE Ltd.](https://appshunter.io/developer/468031768) | [Tomohiro Ohwada](https://appshunter.io/developer/991660409) |

## What reviewers say

### R

[App page](https://appshunter.io/ios/app/r-store/id497299633)

Discover stylish rental properties, including homes, offices, and retail spaces, with this curated real estate app. Search by unique criteria and receive notifications for new listings. Explore featured content about towns and creators.

**Highlights:** Curated selection of unique properties, Search by sensory criteria, Large, high-quality property photos, New listing notifications, Vacancy alerts for favorite properties, Search for homes, offices, and shops, Engaging town and creator content

**Features:** macOS Compatibility

**In-app purchases:** none


### Calc Training (30sec)

[App page](https://appshunter.io/ios/app/calc-training-30sec/id1547381216)

Sharpen your mental math skills with quick, 30-second training sessions. Practice addition, subtraction, multiplication, and mixed problems to improve your arithmetic speed and accuracy. Track your personal bests and challenge yourself to beat your previous scores.

**Highlights:** 30-second intensive training sessions, Addition practice, Subtraction practice, Multiplication practice, Mixed problem training, Personal best tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Development support | $1.99 | one-time |
| Remove Ads & Support | $2.99 | one-time |


## Frequently asked questions

### Is R free?

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

### Is Calc Training (30sec) free?

Calc Training (30sec) is free to download, with in-app purchases available.

### Do R or Calc Training (30sec) have ads?

Calc Training (30sec) shows ads; R does not.

### Which is updated more often, R or Calc Training (30sec)?

R ships an update every 6 weeks, and Calc Training (30sec) monthly. Most recently, R was updated on October 23, 2026 and Calc Training (30sec) on October 24, 2026.

---

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