# POTS vs Mellow

The clearest difference is device support: POTS at 5 against Mellow's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. POTS sells 17 in-app purchases, starting at $4.95 per month and Mellow sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

POTS ships an update every 5 months, Mellow every 4 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | POTS | Mellow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (7 ratings)](https://appshunter.io/ios/app/pots-tracker/id6743040831/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 218 MB | 54 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Digital Therapeutics](https://appshunter.io/developer/1721663167) | [Lumen Labs](https://appshunter.io/developer/1896764763) |

## What reviewers say

### POTS

[App page](https://appshunter.io/ios/app/pots-tracker/id6743040831)

This app helps individuals manage chronic illnesses like POTS, CFS, and long COVID by providing tools to track symptoms, medications, and vital signs. It integrates with Apple Health for comprehensive wellness management and offers customizable alerts and detailed insights for better doctor communication.

**Highlights:** Symptom logging in seconds, Medication reminders, Heart rate & vitals monitoring, Tailored health journal, Progress analytics, Comprehensive wellness tracking, Customizable alerts

**Features:** Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| flex pass | $4.95 | per month |
| easy pass | $5.99 | per 7 days |
| weather max | $9.99 | per 3 months |
| flex pass | $9.99 | per month |
| carey ai max | $19.99 | per month |
| yearly access | $19.99 | per year |
| smart pass | $24.99 | per year |
| carey ai ultra | $29.99 | per month |
| Premium Yearly | $29.99 | per year |
| plus | $34.99 | per year |
| limited discount | $34.99 | per year |
| Extended Trial | $39.99 | per year |
| yearly access | $44.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $1.99 | one-time |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $99.00 | one-time |


### Mellow

[App page](https://appshunter.io/ios/app/mellow-reactive-dog-trainer/id6775967899)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mellow Pro (Monthly) | $9.99 | per month |
| Mellow Pro (Annual) | $59.99 | per year |


## Frequently asked questions

### Is POTS free?

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

### Is Mellow free?

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

### Do POTS or Mellow have ads?

Neither POTS nor Mellow shows ads.

### Which is updated more often, POTS or Mellow?

POTS ships an update every 5 months, and Mellow every 4 months. Most recently, POTS was updated on October 24, 2026 and Mellow on October 28, 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.*