# Headrest vs SipFlow

The clearest difference is update cadence: SipFlow at every 2 days against Headrest's every 10 days. Headrest's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Headrest sells 5 in-app purchases, starting at $7.99 per month and SipFlow sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Headrest ships an update every 10 days, SipFlow every 2 days. The most recent releases landed on October 26, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Headrest | SipFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/headrest-migraine-tracker/id6813458141/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 65 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Evolui AB](https://appshunter.io/developer/1530413649) | [Stanislav Kotlyarenko](https://appshunter.io/developer/6819589804) |

## What reviewers say

### Headrest

[App page](https://appshunter.io/ios/app/headrest-migraine-tracker/id6813458141)

This app forecasts migraine risk based on barometric pressure changes and your personal history. It allows quick logging of attacks and detailed tracking of potential triggers and medication effectiveness. Your data is stored locally, ensuring privacy.

**Highlights:** Barometric pressure forecast, Daily and weekly risk levels, Evening alerts for high-risk days, Quick attack logging, Trigger and medication tracking, Local data storage

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $7.99 | per month |
| Pro Annual Offer | $19.99 | per year |
| Pro Annual | $39.99 | per year |
| Pro Annual | $39.99 | per year |
| Pro Annual | $49.99 | per year |


### SipFlow

[App page](https://appshunter.io/ios/app/sipflow-water-tracker/id6819768243)

**Features:** macOS Compatibility, Apple Watch app, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SipFlow Plus Monthly | $2.99 | per month |
| SipFlow Plus Yearly | $14.99 | per year |
| SipFlow Plus Forever | $29.99 | one-time |


## Frequently asked questions

### Is Headrest free?

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

### Is SipFlow free?

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

### Do Headrest or SipFlow have ads?

Neither Headrest nor SipFlow shows ads.

### Which is updated more often, Headrest or SipFlow?

Headrest ships an update every 10 days, and SipFlow every 2 days. Most recently, Headrest was updated on October 26, 2026 and SipFlow on November 1, 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.*