# GriDot vs Dad's Calculator

The clearest difference is price: Dad's Calculator at Free against GriDot's $2.99. Dad's Calculator also leads on in-app purchases (none vs 2) and update cadence (every 2 days vs monthly). GriDot's advantage is iOS requirement (13.0 vs 15.0). On ads there is nothing between them.

Dad's Calculator is free to download; GriDot costs $2.99 up front. GriDot sells 2 in-app purchases, starting at $0.99 per month. Dad's Calculator asks for nothing beyond the download.

GriDot ships an update monthly, Dad's Calculator every 2 days. Both last shipped on October 27, 2026.

## The numbers

| Metric | GriDot | Dad's Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 13 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ming Rong Ng](https://appshunter.io/developer/1613121108) | [Jaehun Kwon](https://appshunter.io/developer/1708326630) |

## What reviewers say

### GriDot

[App page](https://appshunter.io/ios/app/gridot/id1613135296)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly | $4.49 | per year |


### Dad's Calculator

[App page](https://appshunter.io/ios/app/dads-calculator/id6467169159)

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

**In-app purchases:** none


## Frequently asked questions

### Is GriDot free?

GriDot costs $2.99, and also offers in-app purchases.

### Is Dad's Calculator free?

Dad's Calculator is free to download, with no in-app purchases.

### Do GriDot or Dad's Calculator have ads?

Neither GriDot nor Dad's Calculator shows ads.

### Which is updated more often, GriDot or Dad's Calculator?

GriDot ships an update monthly, and Dad's Calculator every 2 days. Most recently, GriDot was updated on October 27, 2026 and Dad's Calculator on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*