# Train Talk! vs Subtraction with regrouping

The clearest difference is update cadence: Train Talk! at every 9 months against Subtraction with regrouping's every 41 months. Train Talk! also leads on device support (3 vs 1) and iOS requirement (9.0 vs 15.6). Subtraction with regrouping's advantage is price ($0.99 vs $4.99). On ads and in-app purchases there is nothing between them.

Train Talk! costs $4.99 and Subtraction with regrouping $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Train Talk! ships an update every 9 months, Subtraction with regrouping every 41 months. The most recent releases landed on August 31, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Train Talk! | Subtraction with regrouping |
| --- | --- | --- |
| Price | $4.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 41 months |
| Size | 51 MB | 7 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Learning Fundamentals, Inc.](https://appshunter.io/developer/454061076) | [Red Hong](https://appshunter.io/developer/542314714) |

## What reviewers say

### Train Talk!

[App page](https://appshunter.io/ios/app/train-talk/id524164387)

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

**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 Train Talk! free?

Train Talk! costs $4.99, with no in-app purchases.

### Is Subtraction with regrouping free?

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

### Do Train Talk! or Subtraction with regrouping have ads?

Neither Train Talk! nor Subtraction with regrouping shows ads.

### Which is updated more often, Train Talk! or Subtraction with regrouping?

Train Talk! ships an update every 9 months, and Subtraction with regrouping every 41 months. Most recently, Train Talk! was updated on August 31, 2026 and Subtraction with regrouping on October 26, 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.*