# Custom Formulas vs CountKit

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.

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.

## The numbers

| Metric | Custom Formulas | CountKit |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/custom-formulas/id1623368630/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Paid | — |
| Size | 1 MB | 6 MB |
| Requires iOS | **15.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anthony Dunk](https://appshunter.io/developer/704471943) | [Hlib Ustymenko](https://appshunter.io/developer/817064714) |

## What reviewers say

### Custom Formulas

[App page](https://appshunter.io/ios/app/custom-formulas/id1623368630)

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.

**Highlights:** Multiple input/output formula support, Linked formulas via variable names, Formula categorization, Customizable variable display order, Adjustable output decimal precision, Email formula sharing

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

**In-app purchases:** none


### CountKit

[App page](https://appshunter.io/ios/app/countkit-the-anything-counter/id6476781246)

**Features:** Family Sharing

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Monthly Family | $1.99 | per month |
| Annual | $4.99 | per year |
| Annual Family | $6.99 | per year |
| Lifetime | $6.99 | one-time |
| Lifetime Family | $7.99 | one-time |


## Frequently asked questions

### Is Custom Formulas free?

Custom Formulas costs $3.99, with no in-app purchases.

### Is CountKit free?

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

### Do Custom Formulas or CountKit have ads?

Neither Custom Formulas nor CountKit shows ads.

### Which is updated more often, Custom Formulas or CountKit?

Custom Formulas ships an update every 5 days, and CountKit every 5 days. Most recently, Custom Formulas was updated on October 24, 2026 and CountKit on October 5, 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.*