# TangleTables vs Subtraction with regrouping

The clearest difference is update cadence: TangleTables at every 20 months against Subtraction with regrouping's every 41 months. TangleTables also leads on iOS requirement (12.0 vs 15.6). Subtraction with regrouping's advantage is price ($0.99 vs $2.99). On ads, in-app purchases and device support there is nothing between them.

TangleTables costs $2.99 and Subtraction with regrouping $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TangleTables ships an update every 20 months, Subtraction with regrouping every 41 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | TangleTables | Subtraction with regrouping |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 20 months** | Every 41 months |
| Size | 41 MB | 7 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Red Hong](https://appshunter.io/developer/542314714) |

## What reviewers say

### TangleTables

[App page](https://appshunter.io/ios/app/tangletables/id499619867)

**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 TangleTables free?

TangleTables costs $2.99, with no in-app purchases.

### Is Subtraction with regrouping free?

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

### Do TangleTables or Subtraction with regrouping have ads?

Neither TangleTables nor Subtraction with regrouping shows ads.

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

TangleTables ships an update every 20 months, and Subtraction with regrouping every 41 months. Most recently, TangleTables was updated on November 1, 2026 and Subtraction with regrouping on November 6, 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.*