# Formula Calculator # vs CalcFlex

The clearest difference is ads: CalcFlex at none against Formula Calculator #'s shown. CalcFlex also leads on update cadence (every 9 days vs every 5 weeks). Formula Calculator #'s advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Formula Calculator # sells 4 one-off in-app purchases and CalcFlex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Formula Calculator # ships an update every 5 weeks, CalcFlex every 9 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Formula Calculator # | CalcFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/formula-calculator/id6504839903/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 2 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [威 刘](https://appshunter.io/developer/1465235012) | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) |

## What reviewers say

### Formula Calculator #

[App page](https://appshunter.io/ios/app/formula-calculator/id6504839903)

Perform calculations with a vast library of built-in formulas or create your own. Save and sync custom formulas to the cloud for easy access across devices. Includes a comprehensive scientific calculator.

**Highlights:** Extensive built-in calculation formulas, Create and save custom formulas, Cloud synchronization for custom formulas, Share custom formulas with others, Comprehensive scientific calculator

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month subscription | $1.49 | one-time |
| 3 months subscription | $2.49 | one-time |
| 6 months subscription | $3.49 | one-time |
| 1 year subscription | $4.49 | one-time |


### CalcFlex

[App page](https://appshunter.io/ios/app/calcflex-calculator/id6520389768)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +3 New Variables | $1.99 | one-time |
| +20 New Equation Slots | $1.99 | one-time |
| +1 New Calculator | $3.99 | one-time |


## Frequently asked questions

### Is Formula Calculator # free?

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

### Is CalcFlex free?

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

### Do Formula Calculator # or CalcFlex have ads?

Formula Calculator # shows ads; CalcFlex does not.

### Which is updated more often, Formula Calculator # or CalcFlex?

Formula Calculator # ships an update every 5 weeks, and CalcFlex every 9 days. Most recently, Formula Calculator # was updated on October 24, 2026 and CalcFlex on October 25, 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.*