Custom Formulas vs CountKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Custom Formulas
This utility app allows users to create and manage complex calculations with multiple inputs and outputs. Formulas can be linked, grouped into categories, and customized for display precision. Share your custom calculations easily via email.
- Multiple input/output formula support
- Linked formulas via variable names
- Formula categorization
- Customizable variable display order
- Adjustable output decimal precision
- Email formula sharing
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This app is easy to use, but unlike simpler apps, multiple entered values can be fed into multiple formulas and multiple output values can be displayed. The output of one formula in a group can be fed into the next by using the same variable name. Related formulas can be grouped into categories to make them easy to find. e.g. Maths formulas, Surveying formulas, Loan interest formulas etc. The order of variables displayed to the user can be changed, as can the number of decimal digits of precision shown in the output fields. You can easily share formulas with other users of the app by emailing them. Three example formulas are pre-installed with the app. In order of increasing complexity they are: slope percentage, compound interest, and point scale factor.
CountKit
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CountKit is your smart companion for tracking everything important in your life. Whether you're managing your money, staying on top of your to-do list, or maintaining sobriety, CountKit has you covered. This versatile app acts as your personal counter, clicker, and tally tracker all in one. With CountKit, you can: Create counters for any purpose, such as budgeting your money, tracking your savings, or monitoring your debt. Set targets and see your progress towards your goals, whether it's hitting a savings milestone or keeping track of your sobriety. Archive your counters when you’ve reached your goals, keeping a record of your achievements. Customize your counters with different colors and icons for easy identification. Use it as a score tracker for games, a clicker for counting events, or even as a simple tally sheet for your daily tasks. Log your workout activities, track reps and sets, or monitor your daily steps to stay fit and healthy. Keep a tally of your habits, such as drinking water, meditating, or practicing a new skill. Manage your medication schedule by counting doses and ensuring you stay on track. CountKit is more than just a counter; it’s a powerful tool that helps you stay organized and productive. Replace your old spreadsheets with this smart app that makes tracking fun and easy. Whether you're managing bills, tracking your budget, logging workouts, or keeping a tally of your daily activities, CountKit supports you every step of the way. Download CountKit today and take control of your scores, budgets, debt, fitness goals, and daily habits with ease! For any inquiries or feedback about using CountKit to manage your money, track your fitness with daily push-ups, or plan your book reading list, please reach out to us at countkitapp@gmail.com. We’re eager to assist you! Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://www.freeprivacypolicy.com/live/af3b86a3-9e19-43fc-a620-5e5266b3033a
Screenshots
Verdict
The clearest difference is price: CountKit at Free against Custom Formulas's $3.99. Custom Formulas's advantage is in-app purchases (none vs 6) and device support (3 vs 1). On update cadence and ads 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
CountKit is free to download; Custom Formulas costs $3.99 up front. CountKit sells 6 in-app purchases, starting at $0.99 per month. Custom Formulas asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.
| Parameter | Custom Formulas | CountKit |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Anthony Dunk | Hlib Ustymenko |
In-app purchases
Custom Formulas
No in-app purchases
CountKit
- Monthly$0.991 Month
- Monthly Family$1.991 Month
- Annual$4.991 Year
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- Annual Family$6.991 Year
- Lifetime$6.99
- Lifetime Family$7.99









