# Studio Synergy vs Stackr

The clearest difference is in-app purchases: Studio Synergy at none against Stackr's 7. Studio Synergy also leads on device support (3 vs 1) and iOS requirement (11.0.0 vs 17.0). Stackr's advantage is chart position (#194 vs unranked). On price and ads there is nothing between them.

Both are free to download. Stackr sells 7 in-app purchases, starting at $7.99 per 7 days. Studio Synergy asks for nothing beyond the download.

## The numbers

| Metric | Studio Synergy | Stackr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (143 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews)** |
| Number of ratings | — | **143** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Monetization | — | Freemium |
| Best chart rank | — | **#194** |
| Size | 36 MB | 88 MB |
| Requires iOS | **11.0.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Studio Synergy LLC](https://appshunter.io/developer/1778004939) | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) |

## What reviewers say

### Studio Synergy

[App page](https://appshunter.io/ios/app/studio-synergy/id6737802550)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stackr

[App page](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587)

**Currently charting:** #194 Top Free · Health & Fitness (US App Store)

This app simplifies tracking peptide and GLP-1 doses, including supplies like vials and pens. It offers smart reminders, home screen widgets, and visual charts of estimated active levels based on half-life. Designed for users managing peptide protocols, it keeps your dosing information organized and accessible.

**Highlights:** Log peptide and GLP-1 doses, Track vials, pens, and other supplies, Smart reminders for next doses, Home screen widgets, Estimated active level charts, Multi-peptide stack tracking, Reference pages for common compounds

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stackr+ Weekly | $7.99 | per 7 days |
| Monthly | $12.99 | per month |
| Stackr+ Yearly | $29.99 | per year |
| Stackr+ Yearly | $49.99 | per year |
| Stackr+ Yearly | $49.99 | per year |
| Stackr+ Yearly | $59.99 | per year |
| Yearly | $69.99 | per year |


## Frequently asked questions

### Is Studio Synergy free?

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

### Is Stackr free?

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

### Do Studio Synergy or Stackr have ads?

Neither Studio Synergy nor Stackr shows ads.

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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.*