# Custom Formulas vs CARAPACE

The clearest difference is price: CARAPACE at Free against Custom Formulas's $3.99. Custom Formulas's advantage is rating (5.0 vs 4.5) and in-app purchases (none vs 6). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

CARAPACE is free to download; Custom Formulas costs $3.99 up front. CARAPACE sells 6 one-off in-app purchases. Custom Formulas asks for nothing beyond the download.

Custom Formulas holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Custom Formulas ships an update every 5 days, CARAPACE weekly. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Custom Formulas | CARAPACE |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/custom-formulas/id1623368630/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/carapace/id6760282881/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Paid | **Free** |
| Best chart rank | **#186** | — |
| Size | 1 MB | 20 MB |
| Requires iOS | **15.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Anthony Dunk](https://appshunter.io/developer/704471943) | [Michael Paepke Applications](https://appshunter.io/developer/537257902) |

## What reviewers say

### Custom Formulas

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

**Currently charting:** #186 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


### CARAPACE

[App page](https://appshunter.io/ios/app/carapace/id6760282881)

Transform your iPhone into a private control surface for your OpenClaw or Hermes Agent. Connect to your Mac gateway to chat, speak, see, and manage projects and tasks remotely from anywhere on your secure network.

**Highlights:** Private control surface for agents, Chat with personal agent, Voice and camera context sharing, Project and agent management, Run long tasks remotely, Secure network access

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Household to Power | $2.99 | one-time |
| Household — 5 gateways | $4.99 | one-time |
| Power — 10 gateways | $7.99 | one-time |
| Power to Corporate Upgrade | $16.99 | one-time |
| Household to Corporate | $19.99 | one-time |
| Corporate — 50 gateways | $24.99 | one-time |


## Frequently asked questions

### Is Custom Formulas free?

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

### Is CARAPACE free?

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

### Which has better reviews, Custom Formulas or CARAPACE?

Custom Formulas is rated higher. Custom Formulas averages 5.0 out of 5 from 1 ratings, while CARAPACE averages 4.5 from 2 ratings.

### Do Custom Formulas or CARAPACE have ads?

Neither Custom Formulas nor CARAPACE shows ads.

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

Custom Formulas ships an update every 5 days, and CARAPACE weekly. Most recently, Custom Formulas was updated on September 18, 2026 and CARAPACE on September 13, 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.*