# Trio Math vs GEO Flag

The clearest difference is in-app purchases: GEO Flag at none against Trio Math's 2. Trio Math's advantage is iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Trio Math sells 2 one-off in-app purchases. GEO Flag asks for nothing beyond the download.

Trio Math ships an update every 4 days, GEO Flag every 3 days. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Trio Math | GEO Flag |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 123 MB | 24 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHRISTIAN KNOLL](https://appshunter.io/developer/1796167358) | [Creasant Innovision Limited](https://appshunter.io/developer/1098066469) |

## What reviewers say

### Trio Math

[App page](https://appshunter.io/ios/app/trio-math/id6741913788)

Sharpen your mental math skills by finding number combinations that equal a target number. Each combination must use one multiplication and one addition or subtraction. Compete globally and enjoy a privacy-friendly, ad-free experience.

**Highlights:** Number grid puzzles, Multiplication and addition/subtraction required, Daily Challenge Mode, Global Leaderboard, Jokers for hints, Ad-free and privacy-friendly

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MinusTrio - Espresso | $1.99 | one-time |
| MinusTrio - Cappuccino | $2.99 | one-time |


### GEO Flag

[App page](https://appshunter.io/ios/app/geo-flag/id6751402306)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trio Math free?

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

### Is GEO Flag free?

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

### Do Trio Math or GEO Flag have ads?

Neither Trio Math nor GEO Flag shows ads.

### Which is updated more often, Trio Math or GEO Flag?

Trio Math ships an update every 4 days, and GEO Flag every 3 days. Most recently, Trio Math was updated on October 7, 2026 and GEO Flag on October 17, 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.*