# Custom Formulas vs Chronir

The clearest difference is price: Chronir at Free against Custom Formulas's $3.99. Chronir also leads on update cadence (every 2 days vs every 5 days). Custom Formulas's advantage is in-app purchases (none vs 2) and chart position (#172 vs unranked). On ads there is nothing between them.

Chronir is free to download; Custom Formulas costs $3.99 up front. Chronir sells 2 in-app purchases, starting at $1.99 per month. Custom Formulas asks for nothing beyond the download.

Custom Formulas ships an update every 5 days, Chronir every 2 days. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Custom Formulas | Chronir |
| --- | --- | --- |
| 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 2 days** |
| Monetization | Paid | — |
| Best chart rank | **#172** | — |
| Size | 1 MB | 19 MB |
| Requires iOS | **15.4** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anthony Dunk](https://appshunter.io/developer/704471943) | [Lex Caraig](https://appshunter.io/developer/1828424550) |

## What reviewers say

### Custom Formulas

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

**Currently charting:** #172 Top Paid · Utilities (US App Store)

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


### Chronir

[App page](https://appshunter.io/ios/app/chronir/id6758985902)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chronir Plus | $1.99 | per month |
| Chronir Plus (Annual) | $19.99 | per year |


## Frequently asked questions

### Is Custom Formulas free?

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

### Is Chronir free?

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

### Do Custom Formulas or Chronir have ads?

Neither Custom Formulas nor Chronir shows ads.

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

Custom Formulas ships an update every 5 days, and Chronir every 2 days. Most recently, Custom Formulas was updated on October 5, 2026 and Chronir on October 4, 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.*