# Coordinate Challenge vs Subtraction with regrouping

Coordinate Challenge and Subtraction with regrouping are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Coordinate Challenge costs $0.99 and Subtraction with regrouping $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Coordinate Challenge ships an update every 39 months, Subtraction with regrouping every 41 months. The most recent releases landed on June 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Coordinate Challenge | Subtraction with regrouping |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/coordinate-challenge/id634763042/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 39 months** | Every 41 months |
| Monetization | Paid | — |
| Size | 5 MB | 7 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Imagic Place](https://appshunter.io/developer/297428855) | [Red Hong](https://appshunter.io/developer/542314714) |

## What reviewers say

### Coordinate Challenge

[App page](https://appshunter.io/ios/app/coordinate-challenge/id634763042)

Learn and practice using the X/Y coordinate system with this engaging educational game. Compete against friends or challenge yourself in timed modes. It's a fun way to master mathematical concepts.

**Highlights:** X/Y coordinate system practice, Timed challenges, Multiplayer mode, Solo play, Equation solving

**Features:** macOS Compatibility

**In-app purchases:** none


### Subtraction with regrouping

[App page](https://appshunter.io/ios/app/subtraction-with-regrouping/id838762880)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Coordinate Challenge free?

Coordinate Challenge costs $0.99, with no in-app purchases.

### Is Subtraction with regrouping free?

Subtraction with regrouping costs $0.99, with no in-app purchases.

### Do Coordinate Challenge or Subtraction with regrouping have ads?

Neither Coordinate Challenge nor Subtraction with regrouping shows ads.

### Which is updated more often, Coordinate Challenge or Subtraction with regrouping?

Coordinate Challenge ships an update every 39 months, and Subtraction with regrouping every 41 months. Most recently, Coordinate Challenge was updated on June 25, 2026 and Subtraction with regrouping on October 19, 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.*