# Calculator Max vs CalcFlex

The clearest difference is update cadence: CalcFlex at every 9 days against Calculator Max's every 2 months. Calculator Max's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Calculator Max sells 2 in-app purchases, starting at $4.99 per year and CalcFlex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Calculator Max ships an update every 2 months, CalcFlex every 9 days. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Calculator Max | CalcFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (1.8K ratings)](https://appshunter.io/ios/app/calculator-max/id364905554/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 55.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 126 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pavel Kozarek](https://appshunter.io/developer/303215376) | [Daniel Chiu Loong Ng](https://appshunter.io/developer/1755978644) |

## What reviewers say

### Calculator Max

[App page](https://appshunter.io/ios/app/calculator-max/id364905554)

This app offers a comprehensive suite of calculation tools, from basic arithmetic to advanced scientific functions. It features a history tape for easy access and reuse of entries, and a unique scribble pad for handwritten notes and equation solving on iPads. Enjoy a clean interface, multitasking support, and customizable themes.

**Highlights:** Basic and scientific calculators, History tape with export options, Handwritten notes and equation solving, Multitasking support on iPad, Customizable themes and app icons, Home Screen and Lock Screen widgets

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator Max Pro | $4.99 | per year |
| Calculator Max Pro | $3.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 📝 Useful note-taking feature
- 💾 Tape/history feature
- 👍 Clean and intuitive interface
- 🎨 Customizable appearance

**What reviewers complain about**

- 🐛 Compatibility issues with newer iOS versions
- 📤 Lack of export/sharing options for tape/history
- 🔍 Difficulty finding settings
- 🔀 Sensitive orientation switching

**Reported bugs**

- Crashes after iOS 26 update
- Tape not visible/functional on iPhone
- Calculator buttons/layout issues in split-screen mode

**Requested features**

- Left-handed mode
- Backspace/edit functionality
- Scientific calculator mode with tape
- Tape annotation/labeling
- Cloud/Dropbox sync for tape


### 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 Calculator Max free?

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

### Is CalcFlex free?

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

### Do Calculator Max or CalcFlex have ads?

Neither Calculator Max nor CalcFlex shows ads.

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

Calculator Max ships an update every 2 months, and CalcFlex every 9 days. Most recently, Calculator Max was updated on October 19, 2026 and CalcFlex on October 6, 2026.

---

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