# SmartHIIT vs Instruct

The clearest difference is update cadence: SmartHIIT at every 3 days against Instruct's every 2 months. Instruct's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 18.5). On price, ads and in-app purchases there is nothing between them.

Both are free to download. SmartHIIT sells 2 in-app purchases, starting at $4.99 per month and Instruct sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SmartHIIT ships an update every 3 days, Instruct every 2 months. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SmartHIIT | Instruct |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/instruct-ai-interval-timer/id6754808207/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | — | Subscription |
| Size | 25 MB | 42 MB |
| Requires iOS | 18.5 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Diego Dias de Macedo](https://appshunter.io/developer/1293397655) | [Instruct](https://appshunter.io/developer/1850202038) |

## What reviewers say

### SmartHIIT

[App page](https://appshunter.io/ios/app/smarthiit-ai-workout-and-timer/id6754564855)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmartHIIT Pro Monthly | $4.99 | per month |
| SmartHIIT Pro Annual | $34.99 | per year |


### Instruct

[App page](https://appshunter.io/ios/app/instruct-ai-interval-timer/id6754808207)

This app helps group fitness instructors quickly plan, design, and choreograph classes. It offers an AI-powered bot to generate custom workouts, a smart library for organizing past classes, and automatic timer integration. Spend less time planning and more time teaching.

**Highlights:** On-demand Class Builder Bot, Smart Library for past classes, Automatic timer integration, Review and edit class flow, Save and reuse workout templates, Instructor-first interface

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Access (Instruct +) | $2.99 | per 7 days |
| Monthly Pro Access (Instruct +) | $7.99 | per month |


## Frequently asked questions

### Is SmartHIIT free?

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

### Is Instruct free?

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

### Do SmartHIIT or Instruct have ads?

Neither SmartHIIT nor Instruct shows ads.

### Which is updated more often, SmartHIIT or Instruct?

SmartHIIT ships an update every 3 days, and Instruct every 2 months. Most recently, SmartHIIT was updated on October 2, 2026 and Instruct on September 30, 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.*