# Arcletic vs stiff

The clearest difference is ads: stiff at none against Arcletic's shown. Arcletic's advantage is iOS requirement (12.4 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Arcletic sells 10 in-app purchases, starting at $39.99 per year and stiff sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Arcletic ships an update every 8 days, stiff weekly. The most recent releases landed on October 22, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Arcletic | stiff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arcletic-performance-psych/id1603854059/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 110 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Athletic Research Center GmbH](https://appshunter.io/developer/1603854061) | [Nga Man Yip](https://appshunter.io/developer/1878025022) |

## What reviewers say

### Arcletic

[App page](https://appshunter.io/ios/app/arcletic-performance-psych/id1603854059)

This app offers science-based audio sessions for personal and professional growth, using performance psychology and hypnotherapy to help overcome anxiety, boost confidence, and develop a growth mindset. Sessions are short, immersive, and designed for lasting results.

**Highlights:** Science-based audio sessions, Performance psychology techniques, Hypnotherapy for anxiety relief, Develop growth mindset, Boost confidence and performance, Short, immersive audio trainings, Biofeedback for progress tracking

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ARC+ Yearly | $39.99 | per year |
| IMST Goal Setting 1 | $14.99 | one-time |
| IMST Inner Drive | $14.99 | one-time |
| IMST Pre-Workout | $16.99 | one-time |
| IMST Deepwork Focus | $17.99 | one-time |
| IMST Goal Setting Pro | $21.99 | one-time |
| IMST for Tough Days | $39.99 | one-time |
| IMST After Work Transition | $39.99 | one-time |
| IMST Start Work | $39.99 | one-time |
| IMST Anxiety by Marisa Peer | $48.99 | one-time |


### stiff

[App page](https://appshunter.io/ios/app/stiff-screen-time-blocker/id6761408741)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stiff Pro Weekly | $1.99 | per 7 days |
| Stiff Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Arcletic free?

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

### Is stiff free?

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

### Do Arcletic or stiff have ads?

Arcletic shows ads; stiff does not.

### Which is updated more often, Arcletic or stiff?

Arcletic ships an update every 8 days, and stiff weekly. Most recently, Arcletic was updated on October 22, 2026 and stiff on October 19, 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.*