# Plankstar vs Check Day

The clearest difference is in-app purchases: Check Day at none against Plankstar's 3. Check Day also leads on update cadence (every 10 days vs every 3 months). Plankstar's advantage is iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

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

Plankstar ships an update every 3 months, Check Day every 10 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Plankstar | Check Day |
| --- | --- | --- |
| 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 | Yes |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 110 MB | 4 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Youngwan Choi](https://appshunter.io/developer/468424676) | [Sung Ahn Kim](https://appshunter.io/developer/1452083763) |

## 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 |


### Check Day

[App page](https://appshunter.io/ios/app/check-day/id6760960257)

**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 Check Day free?

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

### Do Plankstar or Check Day have ads?

Both Plankstar and Check Day show ads.

### Which is updated more often, Plankstar or Check Day?

Plankstar ships an update every 3 months, and Check Day every 10 days. Most recently, Plankstar was updated on October 24, 2026 and Check Day on October 11, 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.*