# Function Calc vs Journal Air

The clearest difference is rating: Function Calc at 5.0 against Journal Air's 3.0. Function Calc also leads on in-app purchases (none vs 14) and ads (none vs shown). Journal Air's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price and ratings volume there is nothing between them.

Both are free to download. Journal Air sells 13 in-app purchases, starting at $4.99 per 7 days. Function Calc asks for nothing beyond the download.

Function Calc holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Function Calc ships an update monthly, Journal Air every 2 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Function Calc | Journal Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/function-calc/id1188227053/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/journal-air-my-positive-diary/id1608576689/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 114 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hugh Pelham](https://appshunter.io/developer/1188227052) | [Air Apps Systems](https://appshunter.io/developer/1316153435) |

## What reviewers say

### Function Calc

[App page](https://appshunter.io/ios/app/function-calc/id1188227053)

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

**Highlights:** Programmable custom functions, Graphing capabilities, Tape display with edit/undo, Unit conversions (120+), Dictate calculations, Export graphs (PDF, PNG)

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

**In-app purchases:** none


### Journal Air

[App page](https://appshunter.io/ios/app/journal-air-my-positive-diary/id1608576689)

This app helps users achieve mindfulness and self-improvement through private journaling. It allows for mood tracking, stress relief, and building self-care habits. Access premium features like unlimited use and an ad-free experience with a subscription.

**Highlights:** Mood tracking, Daily reflection habit, Identify happiness triggers, Set daily reminders, Improve wellbeing, Privacy focused

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Air Apps One | $4.99 | per 7 days |
| Air Apps One - 1 Week | $4.99 | per 7 days |
| Air Apps One Welcome - 1 Week | $4.99 | per 7 days |
| Air Apps One - 1 Week | $5.99 | per 7 days |
| Air Apps One - 1 Week | $6.99 | per 7 days |
| Air Apps One | $9.99 | per month |
| Air Apps One - 1 Month | $9.99 | per month |
| Air Apps One - 1 Week | $12.99 | per 7 days |
| Air Apps One - 1 Week | $12.99 | per 7 days |
| Air Apps One - 1 Month | $19.99 | per month |
| Air Apps One | $69.99 | per year |
| Air Apps One - 1 Year | $69.99 | per year |
| Air Apps Pro - 1 Month | $199.99 | per month |


## Frequently asked questions

### Is Function Calc free?

Function Calc is free to download, with no in-app purchases.

### Is Journal Air free?

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

### Which has better reviews, Function Calc or Journal Air?

Function Calc is rated higher. Function Calc averages 5.0 out of 5 from 3 ratings, while Journal Air averages 3.0 from 2 ratings.

### Do Function Calc or Journal Air have ads?

Journal Air shows ads; Function Calc does not.

### Which is updated more often, Function Calc or Journal Air?

Function Calc ships an update monthly, and Journal Air every 2 months. Most recently, Function Calc was updated on October 24, 2026 and Journal Air on October 23, 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.*