# NumHole vs Objects Investigator

The clearest difference is in-app purchases: Objects Investigator at none against NumHole's 1. Objects Investigator also leads on iOS requirement (12.4 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. NumHole sells 1 one-off in-app purchase. Objects Investigator asks for nothing beyond the download.

## The numbers

| Metric | NumHole | Objects Investigator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 121 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [永生 刘](https://appshunter.io/developer/830484999) | [CHISW Development LTD](https://appshunter.io/developer/1439571073) |

## What reviewers say

### NumHole

[App page](https://appshunter.io/ios/app/numhole/id1063109824)

This app challenges players with arithmetic puzzles, starting simple and increasing in difficulty. It enhances mental math skills and logical thinking through engaging number-based challenges.

**Highlights:** Gradual difficulty increase, Mental arithmetic training, Algorithmic thinking development, Number-based puzzles, Logical relationship analysis

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 提示次数6次 | $0.99 | one-time |


### Objects Investigator

[App page](https://appshunter.io/ios/app/objects-investigator/id1518561696)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NumHole free?

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

### Is Objects Investigator free?

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

### Do NumHole or Objects Investigator have ads?

Neither NumHole nor Objects Investigator shows ads.

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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.*