Function Calc vs Journal Air
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Function Calc
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.
- Programmable custom functions
- Graphing capabilities
- Tape display with edit/undo
- Unit conversions (120+)
- Dictate calculations
- Export graphs (PDF, PNG)
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A full-function, programmable, graphing scientific calculator designed to be very quick and easy to use, but with the added power of customisation. Tape display is visible while you type, and a swipe away from full screen view. Select and directly input any number from tape, undo or edit calculations. Easily create and use custom functions, store equations and useful numbers, use complex functions with multiple variables - fully programmable. Plot functions on a zoomable graph, export a high-resolution pdf copy. Dictate calculations and numbers for statistical analysis, with instant results. Completely free. • no adverts, no in-app purchases. • full set of scientific functions, unlimited nested brackets. • swipe to undo, step by step. • easily edit calculations and re-calculate. • optionally enter and edit calculations in standard maths format, rather than calculator order. • visible memory store. • tape output shows all calculations – swipe for full screen. • never type the same number twice – direct input from tape. • instantly convert between more than 120 different units. • zoomable text for easy reading and editing. • fully editable useful numbers page – store constants, conversion factors, commonly used numbers, tappable URLs or email addresses, or any text. • create, store and use functions for unit conversions or calculations, as simple as copy and paste. • dictate calculations, or lists of numbers for statistical analysis, get instant results. • create, edit and use complex functions with up to ten inputs or outputs – solve quadratic and cubic equations, calculate mortgage payments, compound interest, body mass index, triangles, the day of the week for any date, sunrise and sunset times and direction for any date and place, statistics (including normal, Student's T, Chi Square and F cumulative probability functions) and more – create or keep exactly what is useful, edit or delete what isn’t. 50 functions included. • fully zoomable graphing capability, plot one or two functions on a graph. Export PNG or high-resolution large pdf copies. • ideal for complex or repetitive tasks – custom functions reduce errors. • full help included.
Journal Air
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.
- Mood tracking
- Daily reflection habit
- Identify happiness triggers
- Set daily reminders
- Improve wellbeing
- Privacy focused
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Journal Air is a diary that helps you to reach mindfulness and self-improvement by sharing your thoughts. Create daily reports, relieve stress, reduce anxiety and depression Your mental health and self-care should always be the highest priority. WITH JOURNAL AIR YOU CAN ▶ Track Your Mood ▶ Make Reflection Your Habit ▶ Discover What Makes You Happy ▶ Set Daily Reminders ▶ Improve Your Wellbeing ▶ Keep Your Privacy Note: The free version may be subject to limitations and the limitations are subject to change. PRO FEATURES: • All Air Apps • Unlimited use • 100% Ad-free • All features Choose from different subscription options. Our standard subscription options are: 1-week Subscription - USD0.49 1-month Subscription - USD1.99 1-year Subscription - USD19.99 Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. Subscription with a free trial period will automatically renew to a paid subscription. You can cancel your subscription or free trial in the iTunes settings at least 24-hours before the end of each current subscription period. The cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to the free service. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. Facebook: https://www.facebook.com/airappsco Twitter: https://twitter.com/airappsco Instagram: https://www.instagram.com/airappsco Privacy Policy: https://airapps.co/privacy Terms Of Use: https://airapps.co/terms Support: support@airapps.co
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Function Calc | Journal Air |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | Hugh Pelham | Air Apps Systems |
Customer experience
Function Calc
Journal Air
In-app purchases
Function Calc
No in-app purchases
Journal Air
- Air Apps One3 Days trial$4.997 Days
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- Air Apps One Welcome - 1 Week3 Days trial$4.997 Days
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- Air Apps One - 1 Month$19.991 Month
- Air Apps One3 Days trial$69.991 Year
- Air Apps One - 1 Year$69.991 Year
- Air Apps Pro - 1 Month$199.991 Month









