# Plank Timer vs Stack

The clearest difference is price: Plank Timer at Free against Stack's $6.99. Plank Timer also leads on ratings volume (11 vs 1) and device support (3 vs 1). On rating, update cadence, ads and in-app purchases there is nothing between them.

Plank Timer is free to download; Stack costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Plank Timer against 5.0 for Stack. That said, the two scores are not equally well evidenced: Plank Timer has 11 ratings behind it against 1, so its average is the more settled of the two.

Plank Timer ships an update every 2 days, Stack daily. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Plank Timer | Stack |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | [5.0 (11 ratings)](https://appshunter.io/ios/app/plank-timer-core-workout-log/id6758397433/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/stack-daily-intentions/id6781799978/reviews) |
| Number of ratings | **11** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | **Daily** |
| Monetization | **Free** | Paid |
| Size | 24 MB | 1 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yoshiaki Kawano](https://appshunter.io/developer/1872698182) | [hsla0001](https://appshunter.io/developer/1778537322) |

## What reviewers say

### Plank Timer

[App page](https://appshunter.io/ios/app/plank-timer-core-workout-log/id6758397433)

This app helps you build a consistent planking habit with a simple timer and tracking features. It offers countdown and countup modes, motivation through record management, and reminder notifications to ensure daily continuity. Strengthen your core efficiently with this straightforward tool.

**Highlights:** Plank timer (countdown), Stopwatch (countup), Record and history management, Streak records, Reminder notifications, Core strength training

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack

[App page](https://appshunter.io/ios/app/stack-daily-intentions/id6781799978)

This app helps you build and complete habits within a 90-day timeframe. It focuses on finishing cycles rather than perpetual tracking, with a limit of three habits at a time. The interface uses a grid to mark progress, and a widget provides quick access to daily tasks.

**Highlights:** Three habit limit, 90-day completion cycles, Manual grid progress tracking, Home-screen widget, One honest skip per week, No accounts or data collection

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

**In-app purchases:** none


## Frequently asked questions

### Is Plank Timer free?

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

### Is Stack free?

Stack costs $6.99, with no in-app purchases.

### Which has better reviews, Plank Timer or Stack?

Plank Timer and Stack are both rated 5.0 out of 5 on the App Store, from 11 and 1 ratings respectively.

### Do Plank Timer or Stack have ads?

Neither Plank Timer nor Stack shows ads.

### Which is updated more often, Plank Timer or Stack?

Plank Timer ships an update every 2 days, and Stack daily. Most recently, Plank Timer was updated on October 25, 2026 and Stack on October 31, 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.*