# Hapi vs FlexCalc

The clearest difference is iOS requirement: FlexCalc at 13.0 against Hapi's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Hapi sells 3 in-app purchases, starting at $1.99 per month and FlexCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Hapi ships an update every 2 weeks, FlexCalc every 3 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | Hapi | FlexCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 21 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LedaPremium](https://appshunter.io/developer/1896533700) | [Tho Tran](https://appshunter.io/developer/1110817755) |

## What reviewers say

### Hapi

[App page](https://appshunter.io/ios/app/hapi-funny-calculator/id6781326759)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HaPi Premium Monthly | $1.99 | per month |
| HaPi Premium Yearly | $9.99 | per year |
| HaPi Premium | $19.99 | one-time |


### FlexCalc

[App page](https://appshunter.io/ios/app/flexcalc-flexible-calculator/id6785043241)

This utility app allows users to create and edit calculations with linked values that update instantly. It offers a history feature to review past work and supports sharing calculations. Users can also customize themes and fonts for a personalized experience.

**Highlights:** Editable calculations, Linked values update automatically, Reuse results in new calculations, Calculation history, Share calculations, Customizable themes and fonts, Scientific functions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy a Coffee | $1.99 | one-time |


## Frequently asked questions

### Is Hapi free?

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

### Is FlexCalc free?

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

### Do Hapi or FlexCalc have ads?

Neither Hapi nor FlexCalc shows ads.

### Which is updated more often, Hapi or FlexCalc?

Hapi ships an update every 2 weeks, and FlexCalc every 3 weeks. Most recently, Hapi was updated on November 5, 2026 and FlexCalc 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.*