# OC vs MindCalc Arithmetic Trainer

The clearest difference is review sentiment: MindCalc Arithmetic Trainer at 100% against OC's 52%. OC's advantage is rating (3.6 vs 2.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OC holds the better App Store score, 3.6 against 2.0. Both are backed by a comparable volume of ratings — 9 and 12 respectively. Written reviews complicate that: 52% of OC's written reviews are positive against 100% of MindCalc Arithmetic Trainer's, so the app with the better star average is not the one people write more warmly about.

OC ships an update every 16 months, MindCalc Arithmetic Trainer every 21 months. The most recent releases landed on September 16, 2026 and August 27, 2026 respectively.

## The numbers

| Metric | OC | MindCalc Arithmetic Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (9 ratings)](https://appshunter.io/ios/app/oc/id306012905/reviews)** | [2.0 (12 ratings)](https://appshunter.io/ios/app/mindcalc-arithmetic-trainer/id306974064/reviews) |
| Number of ratings | 9 | **12** |
| Positive reviews | 52.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 21 months |
| Monetization | Free | Free |
| Size | 12 MB | 4 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oklahoma Christian University](https://appshunter.io/developer/306012908) | [Peter Schorn](https://appshunter.io/developer/291182088) |

## What reviewers say

### OC

[App page](https://appshunter.io/ios/app/oc/id306012905)

Access essential university information, campus news, and a directory of contacts. This portal helps students, faculty, and staff stay connected with campus services and updates.

**Highlights:** Campus portal access, Directory information, University news, Access to important services, Mobile access

**In-app purchases:** none


### MindCalc Arithmetic Trainer

[App page](https://appshunter.io/ios/app/mindcalc-arithmetic-trainer/id306974064)

Sharpen your mental math skills by solving equations where you must select two numbers to match a given result and operator. Earn points for speed, but beware of mistakes that reset your progress. Challenge a friend to a duel of arithmetic prowess.

**Highlights:** Equation solving with number selection, Speed-based scoring, Mistake penalty, High difficulty mode, Two-player competitive mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OC free?

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

### Is MindCalc Arithmetic Trainer free?

MindCalc Arithmetic Trainer is free to download, with no in-app purchases.

### Which has better reviews, OC or MindCalc Arithmetic Trainer?

OC is rated higher. OC averages 3.6 out of 5 from 9 ratings, while MindCalc Arithmetic Trainer averages 2.0 from 12 ratings.

### Do OC or MindCalc Arithmetic Trainer have ads?

Neither OC nor MindCalc Arithmetic Trainer shows ads.

### Which is updated more often, OC or MindCalc Arithmetic Trainer?

OC ships an update every 16 months, and MindCalc Arithmetic Trainer every 21 months. Most recently, OC was updated on September 16, 2026 and MindCalc Arithmetic Trainer on August 27, 2026.

---

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