# Tweak Enhance OTC vs Grid Calculator.

The clearest difference is in-app purchases: Tweak Enhance OTC at none against Grid Calculator.'s 2. Tweak Enhance OTC also leads on iOS requirement (9.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Grid Calculator. sells 2 in-app purchases, starting at $9.99 per 7 days. Tweak Enhance OTC asks for nothing beyond the download.

Tweak Enhance OTC ships an update fortnightly, Grid Calculator. every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Tweak Enhance OTC | Grid Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Size | 70 MB | 10 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Xiamen NewSound Technology Co., Ltd.](https://appshunter.io/developer/1174641815) | [Hong Kong BLJ Cosmetics Limited](https://appshunter.io/developer/1680645623) |

## What reviewers say

### Tweak Enhance OTC

[App page](https://appshunter.io/ios/app/tweak-enhance-otc/id6450766024)

**Features:** macOS Compatibility

**In-app purchases:** none


### Grid Calculator.

[App page](https://appshunter.io/ios/app/grid-calculator/id6757141903)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Gold | $9.99 | per 7 days |
| Yearly Gold | $39.99 | per year |


## Frequently asked questions

### Is Tweak Enhance OTC free?

Tweak Enhance OTC is free to download, with no in-app purchases.

### Is Grid Calculator. free?

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

### Do Tweak Enhance OTC or Grid Calculator. have ads?

Neither Tweak Enhance OTC nor Grid Calculator. shows ads.

### Which is updated more often, Tweak Enhance OTC or Grid Calculator.?

Tweak Enhance OTC ships an update fortnightly, and Grid Calculator. every 2 weeks. Most recently, Tweak Enhance OTC was updated on November 3, 2026 and Grid Calculator. on November 5, 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.*