# Compound vs Calla

Compound and Calla are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Compound sells 3 in-app purchases, starting at $4.99 per month and Calla sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Compound ships an update weekly, Calla every 4 days. Both last shipped on October 2, 2026.

## The numbers

| Metric | Compound | Calla |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/compound-gym-workout-routine/id6796103475/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 17 MB | 69 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [SCOTT BERKLEY SHUMAKER](https://appshunter.io/developer/6795264126) | [Arman Malkhasyan](https://appshunter.io/developer/6804423803) |

## What reviewers say

### Compound

[App page](https://appshunter.io/ios/app/compound-gym-workout-routine/id6796103475)

This workout app simplifies strength training with a single, progressive routine. It automatically tracks your progress, adjusts weights, and includes warm-ups and cool-downs. Log workouts precisely as you perform them, with Apple Watch integration for seamless tracking.

**Highlights:** Automated double progression weight increases, Automatic warm-up and cool-down routines, Customizable rep ranges and weight jumps, Real-time Apple Watch mirroring, Flexible logging for various exercise types, Private, on-device data storage

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Progression · Monthly | $4.99 | per month |
| Progression · Annual | $29.99 | per year |
| Progression · Lifetime | $99.99 | one-time |


### Calla

[App page](https://appshunter.io/ios/app/calla-perimenopause-tracker/id6804423801)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calla Pro - Monthly | $7.99 | per month |
| Calla Pro - Yearly | $39.99 | per year |


## Frequently asked questions

### Is Compound free?

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

### Is Calla free?

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

### Do Compound or Calla have ads?

Neither Compound nor Calla shows ads.

### Which is updated more often, Compound or Calla?

Compound ships an update weekly, and Calla every 4 days. Most recently, Compound was updated on October 2, 2026 and Calla on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*