# Think Big!! vs Chess Notation Trainer Pro

The clearest difference is price: Think Big!! at Free against Chess Notation Trainer Pro's $4.99. Think Big!! also leads on iOS requirement (14.0 vs 18.6). Chess Notation Trainer Pro's advantage is ads (none vs shown) and update cadence (every 6 days vs every 2 weeks). On in-app purchases and device support there is nothing between them.

Think Big!! is free to download; Chess Notation Trainer Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Think Big!! ships an update every 2 weeks, Chess Notation Trainer Pro every 6 days. The most recent releases landed on June 11, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Think Big!! | Chess Notation Trainer Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/think-big/id1452073393/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Ad-supported | — |
| Size | 92 MB | 26 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Newt Group LLC](https://appshunter.io/developer/1289150060) | [Nishat Majid](https://appshunter.io/developer/1727207034) |

## What reviewers say

### Think Big!!

[App page](https://appshunter.io/ios/app/think-big/id1452073393)

A fast-paced game where players must quickly identify and select the largest colored area before a timer runs out. Build your high score, challenge your personal best, and compete on global leaderboards.

**Highlights:** Fast-paced gameplay, Color area selection, Timer-based challenges, High score tracking, Global leaderboards

**Features:** macOS Compatibility

**In-app purchases:** none


### Chess Notation Trainer Pro

[App page](https://appshunter.io/ios/app/chess-notation-trainer-pro/id6478752238)

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

**In-app purchases:** none


## Frequently asked questions

### Is Think Big!! free?

Think Big!! is free to download, with no in-app purchases.

### Is Chess Notation Trainer Pro free?

Chess Notation Trainer Pro costs $4.99, with no in-app purchases.

### Do Think Big!! or Chess Notation Trainer Pro have ads?

Think Big!! shows ads; Chess Notation Trainer Pro does not.

### Which is updated more often, Think Big!! or Chess Notation Trainer Pro?

Think Big!! ships an update every 2 weeks, and Chess Notation Trainer Pro every 6 days. Most recently, Think Big!! was updated on June 11, 2026 and Chess Notation Trainer Pro on September 7, 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.*