# International maths guide vs OTROTango

The clearest difference is update cadence: OTROTango at monthly against International maths guide's every 46 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

International maths guide ships an update every 46 months, OTROTango monthly. The most recent releases landed on March 3, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | International maths guide | OTROTango |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 46 months | **Monthly** |
| Size | 13 MB | 32 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [rahul baweja](https://appshunter.io/developer/804610215) | [ALGO TECH LIMITED](https://appshunter.io/developer/1220310133) |

## What reviewers say

### International maths guide

[App page](https://appshunter.io/ios/app/international-maths-guide/id1121180802)

**Features:** macOS Compatibility

**In-app purchases:** none


### OTROTango

[App page](https://appshunter.io/ios/app/otrotango/id1223066628)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is International maths guide free?

International maths guide is free to download, with no in-app purchases.

### Is OTROTango free?

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

### Do International maths guide or OTROTango have ads?

Neither International maths guide nor OTROTango shows ads.

### Which is updated more often, International maths guide or OTROTango?

International maths guide ships an update every 46 months, and OTROTango monthly. Most recently, International maths guide was updated on March 3, 2026 and OTROTango on September 15, 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.*