# PTSD vs Undercurrent

The clearest difference is update cadence: Undercurrent at monthly against PTSD's every 5 months. PTSD's advantage is device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. PTSD sells 13 in-app purchases, starting at $4.95 per month and Undercurrent sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PTSD ships an update every 5 months, Undercurrent monthly. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PTSD | Undercurrent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ptsd-tracker/id6743565352/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 216 MB | 76 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Digital Therapeutics](https://appshunter.io/developer/1721663167) | [Lloyd Rowat](https://appshunter.io/developer/1166734628) |

## What reviewers say

### PTSD

[App page](https://appshunter.io/ios/app/ptsd-tracker/id6743565352)

This app helps manage the effects of trauma with daily tracking and evidence-based tools. It aims to reduce symptoms like flashbacks and anxiety while improving focus and emotional balance. Gain data-driven insights and personalized structure for mental health recovery.

**Highlights:** Fast symptom logging, Mood, sleep, and medication tracking, Smart analytics and insights, Exportable progress reports, Personalized reminders, Structured journaling, Secure health records, Apple Health integration

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| steady pass | $4.95 | per month |
| easy pass | $7.99 | per 7 days |
| weather max | $9.99 | per 3 months |
| flex pass | $18.99 | per month |
| carey ai max | $19.99 | per month |
| smart pass | $19.99 | per year |
| carey ai ultra | $29.99 | per month |
| limited sale | $29.99 | per year |
| select pass | $34.99 | per year |
| your free pass | $39.99 | per year |
| free access | $39.99 | per year |
| 7-Day Trial | $49.99 | per year |
| carey ai credits | $8.99 | one-time |


### Undercurrent

[App page](https://appshunter.io/ios/app/undercurrent-symptom-tracker/id6759209174)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undercurrent Health: Pro | $19.99 | one-time |


## Frequently asked questions

### Is PTSD free?

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

### Is Undercurrent free?

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

### Do PTSD or Undercurrent have ads?

Neither PTSD nor Undercurrent shows ads.

### Which is updated more often, PTSD or Undercurrent?

PTSD ships an update every 5 months, and Undercurrent monthly. Most recently, PTSD was updated on October 8, 2026 and Undercurrent on October 6, 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.*