# DD vs HIIT Timer

The clearest difference is review sentiment: DD at 100% against HIIT Timer's 0%. DD also leads on rating (5.0 vs 3.0) and monetization model (free vs freemium). HIIT Timer's advantage is iOS requirement (15.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. DD sells 3 one-off in-app purchases and HIIT Timer sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

DD holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: DD has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of DD's written reviews are positive against 0% of HIIT Timer's.

DD ships an update every 3 days, HIIT Timer every 9 days. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DD | HIIT Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/dd-420/id6774722277/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/hiit-timer-interval-workout/id6792977286/reviews) |
| Number of ratings | **13** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | **Free** | Freemium |
| Size | 15 MB | 32 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Shawn Wright](https://appshunter.io/developer/6774722279) | [浩祖 彭](https://appshunter.io/developer/6790351936) |

## What reviewers say

### DD

[App page](https://appshunter.io/ios/app/dd-420/id6774722277)

A private wellness companion for veterans managing PTSD and using cannabis. It offers daily symptom tracking, cannabis session logging, and evidence-based coping tools. All data stays on your device, with no accounts or ads.

**Highlights:** Daily PTSD symptom check-ins, Cannabis session logging, Personalized insights and charts, Evidence-based coping tools, Tolerance break tracker, Direct access to Veterans Crisis Line

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Tip | $2.99 | one-time |
| Lunch Tip | $4.99 | one-time |
| Hero Tip | $9.99 | one-time |


### HIIT Timer

[App page](https://appshunter.io/ios/app/hiit-timer-interval-workout/id6792977286)

This app helps you create and follow custom interval training routines for various fitness activities. It provides clear visual cues, voice announcements, and haptic feedback to keep you focused. Track your progress with a detailed dashboard of completed workouts and training streaks.

**Highlights:** Customizable workout creation, Visual and audio cues, Haptic feedback, Progress tracking dashboard, Background audio support, Pause/continue functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Lifetime Pass | $19.99 | one-time |


## Frequently asked questions

### Is DD free?

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

### Is HIIT Timer free?

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

### Which has better reviews, DD or HIIT Timer?

DD is rated higher. DD averages 5.0 out of 5 from 13 ratings, while HIIT Timer averages 3.0 from 1 ratings.

### Do DD or HIIT Timer have ads?

Neither DD nor HIIT Timer shows ads.

### Which is updated more often, DD or HIIT Timer?

DD ships an update every 3 days, and HIIT Timer every 9 days. Most recently, DD was updated on October 8, 2026 and HIIT Timer on October 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.*