# Calmgraph vs MindFlow

The clearest difference is update cadence: MindFlow at every 4 days against Calmgraph's every 2 weeks. MindFlow also leads on iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Calmgraph sells 1 one-off in-app purchase and MindFlow sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Calmgraph ships an update every 2 weeks, MindFlow every 4 days. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Calmgraph | MindFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 10 MB | 12 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YANGLI CHEN](https://appshunter.io/developer/1886058795) | [Kaoru Noji](https://appshunter.io/developer/6799341150) |

## What reviewers say

### Calmgraph

[App page](https://appshunter.io/ios/app/calmgraph-stress-and-hrv/id6790698772)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calmgraph Pro | $9.99 | one-time |


### MindFlow

[App page](https://appshunter.io/ios/app/mindflow/id6799341148)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindFlow Plus（月額） | $4.99 | per month |
| MindFlow Plus（年額） | $29.99 | per year |


## Frequently asked questions

### Is Calmgraph free?

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

### Is MindFlow free?

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

### Do Calmgraph or MindFlow have ads?

Neither Calmgraph nor MindFlow shows ads.

### Which is updated more often, Calmgraph or MindFlow?

Calmgraph ships an update every 2 weeks, and MindFlow every 4 days. Most recently, Calmgraph was updated on October 25, 2026 and MindFlow on October 18, 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.*