# Plankstar vs InterFit

The clearest difference is in-app purchases: InterFit at none against Plankstar's 3. InterFit also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Plankstar sells 3 in-app purchases, starting at $0.99 per month. InterFit asks for nothing beyond the download.

Plankstar ships an update every 3 months, InterFit every 2 months. The most recent releases landed on October 4, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Plankstar | InterFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/plankstar-plank-workout-timer/id1607941164/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 107 MB | 4 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Youngwan Choi](https://appshunter.io/developer/468424676) | [EUNHWAN LEE](https://appshunter.io/developer/1720138693) |

## What reviewers say

### Plankstar

[App page](https://appshunter.io/ios/app/plankstar-plank-workout-timer/id1607941164)

This app helps you track and improve your plank workouts with various timer modes, voice guidance, and detailed statistics. It automatically records your progress and allows you to share achievements. Unlock premium features and remove ads with an in-app purchase.

**Highlights:** Plank timer with goal, max time, and set modes, Voice guidance and sound effects, Automatic workout recording, Workout calendar and statistics, Customizable challenges, Apple Health integration, Social sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $0.99 | per month |
| Annual Premium | $3.99 | per year |
| Lifetime Premium | $19.99 | one-time |


### InterFit

[App page](https://appshunter.io/ios/app/interfit/id6741092302)

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

**In-app purchases:** none


## Frequently asked questions

### Is Plankstar free?

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

### Is InterFit free?

InterFit is free to download, with no in-app purchases.

### Do Plankstar or InterFit have ads?

Plankstar shows ads; InterFit does not.

### Which is updated more often, Plankstar or InterFit?

Plankstar ships an update every 3 months, and InterFit every 2 months. Most recently, Plankstar was updated on October 4, 2026 and InterFit on September 17, 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.*