# ChangeHero vs Smart Mental Math Trainer

The clearest difference is ads: Smart Mental Math Trainer at none against ChangeHero's shown. Smart Mental Math Trainer also leads on update cadence (every 3 days vs every 2 months) and iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. ChangeHero sells 2 one-off in-app purchases and Smart Mental Math Trainer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ChangeHero ships an update every 2 months, Smart Mental Math Trainer every 3 days. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ChangeHero | Smart Mental Math Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-mental-math-trainer/id6761359389/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 581 MB | 32 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [jihye kim](https://appshunter.io/developer/1760867780) | [Maximilian Daniliev](https://appshunter.io/developer/1889111350) |

## What reviewers say

### ChangeHero

[App page](https://appshunter.io/ios/app/changehero/id6749336103)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Premium Version | $3.99 | one-time |


### Smart Mental Math Trainer

[App page](https://appshunter.io/ios/app/smart-mental-math-trainer/id6761359389)

Improve your arithmetic skills with an AI coach that adapts to your learning pace. Master multiplication, division, percentages, and more through interactive lessons and targeted practice sessions. Learn practical calculation strategies to boost speed and accuracy in everyday situations.

**Highlights:** Adaptive AI coaching, Learn calculation strategies, Practice core arithmetic skills, Focus on weak spots, Progress tracking, Short, high-impact sessions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-day Trial | Free | one-time |
| Lifetime Unlock | $3.99 | one-time |


## Frequently asked questions

### Is ChangeHero free?

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

### Is Smart Mental Math Trainer free?

Smart Mental Math Trainer is free to download, with in-app purchases available.

### Do ChangeHero or Smart Mental Math Trainer have ads?

ChangeHero shows ads; Smart Mental Math Trainer does not.

### Which is updated more often, ChangeHero or Smart Mental Math Trainer?

ChangeHero ships an update every 2 months, and Smart Mental Math Trainer every 3 days. Most recently, ChangeHero was updated on October 25, 2026 and Smart Mental Math Trainer on October 21, 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.*