# ColumnAddSub vs Trachtenberg Kids

The clearest difference is in-app purchases: ColumnAddSub at none against Trachtenberg Kids's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Trachtenberg Kids sells 2 in-app purchases, starting at $9.99 per month. ColumnAddSub asks for nothing beyond the download.

ColumnAddSub ships an update monthly, Trachtenberg Kids every 3 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ColumnAddSub | Trachtenberg Kids |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 1 MB | 49 MB |
| Requires iOS | **16.2** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PETER JAMES SIDES](https://appshunter.io/developer/1619752154) | [Hayde Tech Ltd](https://appshunter.io/developer/1856967495) |

## What reviewers say

### ColumnAddSub

[App page](https://appshunter.io/ios/app/columnaddsub/id6463636415)

**Features:** macOS Compatibility

**In-app purchases:** none


### Trachtenberg Kids

[App page](https://appshunter.io/ios/app/trachtenberg-kids-mental-math/id6775289064)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $9.99 | per month |
| Premium - Yearly | $29.99 | per year |


## Frequently asked questions

### Is ColumnAddSub free?

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

### Is Trachtenberg Kids free?

Trachtenberg Kids is free to download, with in-app purchases available.

### Do ColumnAddSub or Trachtenberg Kids have ads?

Neither ColumnAddSub nor Trachtenberg Kids shows ads.

### Which is updated more often, ColumnAddSub or Trachtenberg Kids?

ColumnAddSub ships an update monthly, and Trachtenberg Kids every 3 weeks. Most recently, ColumnAddSub was updated on October 27, 2026 and Trachtenberg Kids on October 28, 2026.

---

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