# StackFlow vs StackDay

The clearest difference is ads: StackFlow at none against StackDay's shown. StackDay's advantage is update cadence (every 3 days vs every 2 weeks) and ratings volume (5 vs 1). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. StackFlow sells 2 in-app purchases, starting at $4.99 per month and StackDay sells 8 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for StackFlow against 5.0 for StackDay. That said, the two scores are not equally well evidenced: StackDay has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

StackFlow ships an update every 2 weeks, StackDay every 3 days. The most recent releases landed on July 11, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | StackFlow | StackDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/stackflow-supplement-planner/id6761324946/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/stackday-supplement-and-peptide/id6761502044/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 5 MB | 20 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [航东 郭](https://appshunter.io/developer/1874353215) | [Fog Hill, LLC](https://appshunter.io/developer/1496413878) |

## What reviewers say

### StackFlow

[App page](https://appshunter.io/ios/app/stackflow-supplement-planner/id6761324946)

This app helps you manage complex supplement routines by scanning labels, providing AI-driven timing suggestions based on ingredient interactions, and tracking your body's response. It visualizes synergy and spacing for optimal intake.

**Highlights:** AI-powered supplement timing, Supplement label scanning, Ingredient-level intelligence, Synergy and spacing visualization, Daily routine tracking, Body response logging, Daily insights feed

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StackFlow Pro Monthly | $4.99 | per month |
| StackFlow Pro Annual | $29.99 | per year |


### 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 StackFlow free?

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

### Is StackDay free?

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

### Which has better reviews, StackFlow or StackDay?

StackFlow and StackDay are both rated 5.0 out of 5 on the App Store, from 1 and 5 ratings respectively.

### Do StackFlow or StackDay have ads?

StackDay shows ads; StackFlow does not.

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

StackFlow ships an update every 2 weeks, and StackDay every 3 days. Most recently, StackFlow was updated on July 11, 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.*