# Compound Calculator vs Lucid

The clearest difference is price: Lucid at Free against Compound Calculator's $0.99. Lucid also leads on in-app purchases (none vs 3). Compound Calculator's advantage is update cadence (every 5 days vs every 2 weeks). On ads, device support and iOS requirement there is nothing between them.

Lucid is free to download; Compound Calculator costs $0.99 up front. Compound Calculator sells 3 in-app purchases, starting at $2.99 per month. Lucid asks for nothing beyond the download.

Compound Calculator ships an update every 5 days, Lucid every 2 weeks. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Compound Calculator | Lucid |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/lucid-notes-and-outlines/id6760377356/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 5 MB | 5 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [illia chaban](https://appshunter.io/developer/1875606183) |

## What reviewers say

### Compound Calculator

[App page](https://appshunter.io/ios/app/compound-calculator-lite/id6749442265)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compound Calculator - Pro 30days | $2.99 | per month |
| Compound Calculator - Pro 360days | $14.99 | per year |
| Compound Calculator Pro - lifetime | $19.99 | one-time |


### Lucid

[App page](https://appshunter.io/ios/app/lucid-notes-and-outlines/id6760377356)

Organize your thoughts with a minimalist, gesture-driven note-taking app. Connect and nest ideas fluidly with block-based editing. Bookmark sections and navigate easily with intuitive gestures.

**Highlights:** Minimalist and intuitive design, Fluid, block-based editing, Gesture-driven navigation, Bookmark any section, Spacebar caret navigation

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

**In-app purchases:** none


## Frequently asked questions

### Is Compound Calculator free?

Compound Calculator costs $0.99, and also offers in-app purchases.

### Is Lucid free?

Lucid is free to download, with no in-app purchases.

### Do Compound Calculator or Lucid have ads?

Neither Compound Calculator nor Lucid shows ads.

### Which is updated more often, Compound Calculator or Lucid?

Compound Calculator ships an update every 5 days, and Lucid every 2 weeks. Most recently, Compound Calculator was updated on October 10, 2026 and Lucid on October 14, 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.*