# Spectre vs Plank King

The clearest difference is in-app purchases: Spectre at none against Plank King's 3. Spectre also leads on update cadence (every 3 weeks vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Plank King sells 3 in-app purchases, starting at $2.99 per month. Spectre asks for nothing beyond the download.

Spectre ships an update every 3 weeks, Plank King every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spectre | Plank King |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 33 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Codebase SRL](https://appshunter.io/developer/1677178275) | [源 陈](https://appshunter.io/developer/1217365131) |

## What reviewers say

### Spectre

[App page](https://appshunter.io/ios/app/spectre/id1534547805)

**In-app purchases:** none


### Plank King

[App page](https://appshunter.io/ios/app/plank-king-abs-workout-log/id1551261027)

This app helps you build a consistent core-training habit with a focused plank timer and progressive 30-day plans. Track your progress, view trends, and stay motivated with streaks and achievements. It's designed for everyday use and habit tracking.

**Highlights:** One-tap plank timer, 30-day progressive plans, Workout history and progress trends, Daily habit reminders, Apple Health sync, Streaks, achievements, and leaderboards

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Six-Month Subscription | $14.99 | per 6 months |
| Premium Plus Bundle | $24.99 | per year |


## Frequently asked questions

### Is Spectre free?

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

### Is Plank King free?

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

### Do Spectre or Plank King have ads?

Neither Spectre nor Plank King shows ads.

### Which is updated more often, Spectre or Plank King?

Spectre ships an update every 3 weeks, and Plank King every 2 months. Most recently, Spectre was updated on October 25, 2026 and Plank King on October 24, 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.*