# Numbers Log & Trend Tracker vs StackFlow

The clearest difference is in-app purchases: Numbers Log & Trend Tracker at none against StackFlow's 2. Numbers Log & Trend Tracker also leads on iOS requirement (15.0 vs 17.6). StackFlow's advantage is device support. On price there is nothing between them.

Both are free to download. StackFlow sells 2 in-app purchases, starting at $4.99 per month. Numbers Log & Trend Tracker asks for nothing beyond the download.

## The numbers

| Metric | Numbers Log & Trend Tracker | StackFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stackflow-supplement-planner/id6761324946/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 5 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [晓军 闫](https://appshunter.io/developer/1864802087) | [航东 郭](https://appshunter.io/developer/1874353215) |

## What reviewers say

### Numbers Log & Trend Tracker

[App page](https://appshunter.io/ios/app/numbers-log-and-trend-tracker/id6759046149)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Numbers Log & Trend Tracker free?

Numbers Log & Trend Tracker is free to download, with no in-app purchases.

### Is StackFlow free?

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

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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.*