# Seed Controller vs Stack

The clearest difference is review sentiment: Stack at 100% against Seed Controller's 50%. Stack also leads on in-app purchases (none vs 4). Seed Controller's advantage is iOS requirement (13.0 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Seed Controller sells 4 in-app purchases, starting at $9.99 per month. Stack asks for nothing beyond the download.

Seed Controller ships an update weekly, Stack every 10 days. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Seed Controller | Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/stack-gym-tracker/id6760980211/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | Subscription | **Free** |
| Size | 57 MB | 22 MB |
| Requires iOS | **13.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Kai Frohner](https://appshunter.io/developer/1776464008) | [Lauterstar Technologies, Inc](https://appshunter.io/developer/6794436202) |

## What reviewers say

### Seed Controller

[App page](https://appshunter.io/ios/app/seed-controller-retention/id6752268643)

This app helps users track their progress, stay motivated with daily insights, and build discipline through habit formation and achievements. It aims to enhance focus, energy, and drive.

**Highlights:** Track streak progress, Daily motivational insights, Science-backed benefits, Habit building tools, Achievement unlocking, Visualize growth

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan for Seed Controller | $9.99 | per month |
| yearlydiscount2 | $17.99 | per year |
| yearlydiscount1 | $21.49 | per year |
| Yeary Plan for Seed Controller | $39.99 | per year |


### Stack

[App page](https://appshunter.io/ios/app/stack-gym-tracker/id6760980211)

This app helps users track their weightlifting progress with a focus on ease of use and data privacy. It allows for detailed logging of sets, exercise planning, and visual progress tracking without ads or intrusive notifications.

**Highlights:** Distraction-free lifting log, Local-first data storage with optional iCloud sync, Customizable splits and routines, Extensive exercise library with muscle mapping, Detailed per-set logging, Plate calculator for real-world racks, Progress visualization and trend analysis

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

**In-app purchases:** none


## Frequently asked questions

### Is Seed Controller free?

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

### Is Stack free?

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

### Do Seed Controller or Stack have ads?

Neither Seed Controller nor Stack shows ads.

### Which is updated more often, Seed Controller or Stack?

Seed Controller ships an update weekly, and Stack every 10 days. Most recently, Seed Controller was updated on October 9, 2026 and Stack on October 2, 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.*