# MoodStack vs Personal Training Diary

The clearest difference is iOS requirement: MoodStack at 18.0 against Personal Training Diary's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. MoodStack sells 11 in-app purchases, starting at $3.99 per 7 days and Personal Training Diary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MoodStack ships an update every 4 days, Personal Training Diary every 5 days. The most recent releases landed on September 12, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | MoodStack | Personal Training Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Freemium | — |
| Size | 15 MB | 4 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Martin Condet](https://appshunter.io/developer/1696467493) | [Dieter Schmidt](https://appshunter.io/developer/1656416539) |

## What reviewers say

### MoodStack

[App page](https://appshunter.io/ios/app/moodstack-supplement-truth/id6745878390)

This app analyzes supplements using AI to reveal their actual quality and effectiveness. It provides evidence-based recommendations for your health goals and audits your current supplement stack for potential issues and better alternatives.

**Highlights:** AI-powered supplement scanning, Quality score for products, Bioavailability and toxicity flags, Evidence-based symptom solver, Supplement stack auditing, Personalized alternative recommendations, Peptide library with sourced explainers

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $3.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Weekly Membership | $9.99 | per 7 days |
| Monthly Membership | $9.99 | per month |
| MoodStack Pro — Yearly | $29.99 | per year |
| Yearly Membership | $47.99 | per year |
| Yearly Membership | $47.99 | per year |
| Yearly Membership | $49.90 | per year |
| Yearly Membership | $49.99 | per year |
| Yearly Membership | $69.99 | per year |
| Yearly Membership | $69.99 | per year |


### Personal Training Diary

[App page](https://appshunter.io/ios/app/personal-training-diary/id6756542522)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Personal Training Diary Pro | $4.99 | one-time |


## Frequently asked questions

### Is MoodStack free?

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

### Is Personal Training Diary free?

Personal Training Diary is free to download, with in-app purchases available.

### Do MoodStack or Personal Training Diary have ads?

Neither MoodStack nor Personal Training Diary shows ads.

### Which is updated more often, MoodStack or Personal Training Diary?

MoodStack ships an update every 4 days, and Personal Training Diary every 5 days. Most recently, MoodStack was updated on September 12, 2026 and Personal Training Diary on September 8, 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.*