# FuelStack vs StackDay

The clearest difference is in-app purchases: FuelStack at none against StackDay's 8. FuelStack also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). StackDay's advantage is update cadence (every 3 days vs every 10 months). On price and device support there is nothing between them.

Both are free to download. StackDay sells 8 in-app purchases, starting at $0.99 per 7 days. FuelStack asks for nothing beyond the download.

FuelStack ships an update every 10 months, StackDay every 3 days. The most recent releases landed on September 7, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | FuelStack | StackDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/stackday-supplement-and-peptide/id6761502044/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 33 MB | 20 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Yoann Abriel](https://appshunter.io/developer/1845368848) | [Fog Hill, LLC](https://appshunter.io/developer/1496413878) |

## What reviewers say

### FuelStack

[App page](https://appshunter.io/ios/app/fuelstack/id6753880979)

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

**In-app purchases:** none


### StackDay

[App page](https://appshunter.io/ios/app/stackday-supplement-and-peptide/id6761502044)

This app helps you consistently take your vitamins and supplements. Log doses, build streaks, and view your adherence over time. It offers smart reminders and pre-loaded supplement information to make tracking easy.

**Highlights:** Daily checklist for all supplements, 50+ pre-loaded supplements, Streak and adherence statistics, Customizable smart reminders, Local data storage for privacy, Home screen widget (Pro)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly Discount | $0.99 | per 7 days |
| Pro Weekly | $1.99 | per 7 days |
| Pro Monthly Discount | $3.99 | per month |
| StackDay Pro Monthly | $4.99 | per month |
| StackDay Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Discount | $19.99 | per year |
| StackDay Pro Annual Subscription | $24.99 | per year |
| StackDay Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is FuelStack free?

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

### Is StackDay free?

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

### Do FuelStack or StackDay have ads?

StackDay shows ads; FuelStack does not.

### Which is updated more often, FuelStack or StackDay?

FuelStack ships an update every 10 months, and StackDay every 3 days. Most recently, FuelStack was updated on September 7, 2026 and StackDay on September 6, 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.*