# Subtraction Skill Builders vs Hello, Hero

The clearest difference is price: Hello, Hero at Free against Subtraction Skill Builders's $2.99. Hello, Hero also leads on update cadence (weekly vs every 28 months). Subtraction Skill Builders's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 16.0). On ads and device support there is nothing between them.

Hello, Hero is free to download; Subtraction Skill Builders costs $2.99 up front. Hello, Hero sells 3 one-off in-app purchases. Subtraction Skill Builders asks for nothing beyond the download.

Subtraction Skill Builders ships an update every 28 months, Hello, Hero weekly. The most recent releases landed on October 31, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Subtraction Skill Builders | Hello, Hero |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hello-hero/id6739343026/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 2 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Prima Aestate LLC](https://appshunter.io/developer/1674729630) |

## What reviewers say

### Subtraction Skill Builders

[App page](https://appshunter.io/ios/app/subtraction-skill-builders/id1271517241)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hello, Hero

[App page](https://appshunter.io/ios/app/hello-hero/id6739343026)

Explore history by conversing with famous figures and heroes from different eras. This app allows for multilingual interactions, voice chat, and customization of AI models. Save and review past conversations, and switch between light and dark modes.

**Highlights:** Conversations with historical figures, Multilingual support, Voice chat functionality, Customizable AI models, Persistent chat storage, Light/dark mode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tokens 1M | $1.99 | one-time |
| Tokens 5M | $5.99 | one-time |
| Tokens 10M | $9.99 | one-time |


## Frequently asked questions

### Is Subtraction Skill Builders free?

Subtraction Skill Builders costs $2.99, with no in-app purchases.

### Is Hello, Hero free?

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

### Do Subtraction Skill Builders or Hello, Hero have ads?

Neither Subtraction Skill Builders nor Hello, Hero shows ads.

### Which is updated more often, Subtraction Skill Builders or Hello, Hero?

Subtraction Skill Builders ships an update every 28 months, and Hello, Hero weekly. Most recently, Subtraction Skill Builders was updated on October 31, 2026 and Hello, Hero on November 4, 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.*