# Drowning Math vs IDTQ

The clearest difference is in-app purchases: Drowning Math at none against IDTQ's 3. Drowning Math also leads on ads (none vs shown) and update cadence (every 5 days vs every 3 months). IDTQ's advantage is device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. IDTQ sells 3 in-app purchases, starting at $0.99 per month. Drowning Math asks for nothing beyond the download.

Drowning Math ships an update every 5 days, IDTQ every 3 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Drowning Math | IDTQ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 3 months |
| Size | 67 MB | 138 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Brothapps, SL](https://appshunter.io/developer/1126030162) | [Alireza Dehghan](https://appshunter.io/developer/1835508355) |

## What reviewers say

### Drowning Math

[App page](https://appshunter.io/ios/app/drowning-math-mental-math/id6450683721)

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

**In-app purchases:** none


### IDTQ

[App page](https://appshunter.io/ios/app/idtq/id6751514173)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month of ads-free experience | $0.99 | per month |
| 1 year of ads-free experience | $2.99 | per year |
| 1 year of ads-free experience | $4.99 | per year |


## Frequently asked questions

### Is Drowning Math free?

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

### Is IDTQ free?

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

### Do Drowning Math or IDTQ have ads?

IDTQ shows ads; Drowning Math does not.

### Which is updated more often, Drowning Math or IDTQ?

Drowning Math ships an update every 5 days, and IDTQ every 3 months. Most recently, Drowning Math was updated on November 3, 2026 and IDTQ on November 5, 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.*