# Instant Cal vs Calculator .

The clearest difference is in-app purchases: Instant Cal at none against Calculator .'s 4. Instant Cal also leads on device support (3 vs 1). Calculator .'s advantage is ads (none vs shown). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Calculator . sells 4 in-app purchases, starting at $4.99 per 7 days. Instant Cal asks for nothing beyond the download.

Instant Cal ships an update every 2 weeks, Calculator . fortnightly. Both last shipped on October 28, 2026.

## The numbers

| Metric | Instant Cal | Calculator . |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.2 (9 ratings)](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693/reviews)** |
| Number of ratings | — | **9** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 7 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Taek Oh](https://appshunter.io/developer/1616205954) | [Hong Kong Global Cross-Border E-Commerce Co., Limited](https://appshunter.io/developer/1693750577) |

## What reviewers say

### Instant Cal

[App page](https://appshunter.io/ios/app/instant-cal/id6772655662)

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

**In-app purchases:** none


### Calculator .

[App page](https://appshunter.io/ios/app/calculator-ai-math-solver/id6776479693)

This utility app combines standard and scientific calculations with unit and currency conversions. It features a clean interface, calculation history, and automatic rate updates for currencies. Easily switch between functions without leaving the app.

**Highlights:** Standard and scientific calculator, Unit conversion (length, weight, area, volume, temperature), Currency conversion with automatic rate updates, Calculation history, Distraction-free dark interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Peak | $4.99 | per 7 days |
| Weekly Ring | $9.99 | per 7 days |
| Yearly Peak | $39.99 | per year |
| Yearly Ring | $39.99 | per year |


## Frequently asked questions

### Is Instant Cal free?

Instant Cal is free to download, with no in-app purchases.

### Is Calculator . free?

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

### Do Instant Cal or Calculator . have ads?

Instant Cal shows ads; Calculator . does not.

### Which is updated more often, Instant Cal or Calculator .?

Instant Cal ships an update every 2 weeks, and Calculator . fortnightly. Most recently, Instant Cal was updated on October 28, 2026 and Calculator . on October 28, 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.*