# Card◆IO vs ACERUN US

The clearest difference is update cadence: ACERUN US at every 9 days against Card◆IO's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Card◆IO sells 3 in-app purchases, starting at $2.99 per 7 days and ACERUN US sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Card◆IO ships an update every 3 weeks, ACERUN US every 9 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Card◆IO | ACERUN US |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 130 MB |
| Requires iOS | 18.2 | **18.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Mathilde Henriot](https://appshunter.io/developer/1403418618) | [RunPad](https://appshunter.io/developer/1893366038) |

## What reviewers say

### Card◆IO

[App page](https://appshunter.io/ios/app/cardio/id1593402871)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per 7 days |
| Premium | $8.99 | per month |
| Premium | $69.99 | per year |


### ACERUN US

[App page](https://appshunter.io/ios/app/acerun-us/id6762207347)

This running app uses AI to create personalized, adaptive training plans. It analyzes numerous factors to help runners achieve their goals, with compatibility for popular smartwatches.

**Highlights:** AI-driven personalized training plans, Adaptive Coaching Engine (ACE), Real-time performance analysis, Apple Watch compatibility, Garmin compatibility, Evolving training based on goals

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ACERUNCOACH | $4.99 | per month |
| ACERUNONE | $9.99 | per month |


## Frequently asked questions

### Is Card◆IO free?

Card◆IO is free to download, with in-app purchases available.

### Is ACERUN US free?

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

### Do Card◆IO or ACERUN US have ads?

Neither Card◆IO nor ACERUN US shows ads.

### Which is updated more often, Card◆IO or ACERUN US?

Card◆IO ships an update every 3 weeks, and ACERUN US every 9 days. Most recently, Card◆IO was updated on November 3, 2026 and ACERUN US on November 7, 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.*