# Pro OnTime vs Gratuity Lab

The clearest difference is ads: Pro OnTime at none against Gratuity Lab's shown. Pro OnTime also leads on iOS requirement (15.0 vs 17.0). Gratuity Lab's advantage is update cadence (every 5 days vs fortnightly). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Pro OnTime ships an update fortnightly, Gratuity Lab every 5 days. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Pro OnTime | Gratuity Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 5 days** |
| Size | 37 MB | 10 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SIDEREAL TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1481462615) | [Wenbin lei](https://appshunter.io/developer/1787331500) |

## What reviewers say

### Pro OnTime

[App page](https://appshunter.io/ios/app/pro-ontime/id6499000843)

**Features:** macOS Compatibility

**In-app purchases:** none


### Gratuity Lab

[App page](https://appshunter.io/ios/app/gratuity-lab-tip-calculator/id6797330328)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pro OnTime free?

Pro OnTime is free to download, with no in-app purchases.

### Is Gratuity Lab free?

Gratuity Lab is free to download, with no in-app purchases.

### Do Pro OnTime or Gratuity Lab have ads?

Gratuity Lab shows ads; Pro OnTime does not.

### Which is updated more often, Pro OnTime or Gratuity Lab?

Pro OnTime ships an update fortnightly, and Gratuity Lab every 5 days. Most recently, Pro OnTime was updated on October 4, 2026 and Gratuity Lab on October 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.*