# Stackr vs SpicyCalc

The clearest difference is rating: SpicyCalc at 5.0 against Stackr's 4.4. SpicyCalc also leads on iOS requirement (15.1 vs 17.0). Stackr's advantage is ratings volume (143 vs 1) and chart position (#195 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Stackr sells 7 in-app purchases, starting at $7.99 per 7 days and SpicyCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SpicyCalc holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stackr has 143 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Stackr | SpicyCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (143 ratings)](https://appshunter.io/ios/app/stackr-peptide-glp-1-tracker/id6764821587/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spicycalc/id6784360950/reviews)** |
| Number of ratings | **143** | 1 |
| Positive reviews | 72.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#195** | — |
| Size | 88 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Stackr Holdings LLC](https://appshunter.io/developer/1896525659) | [Ocoee Studios LLC](https://appshunter.io/developer/6784049772) |

## What reviewers say

### Stackr

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

**Currently charting:** #195 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 |


### SpicyCalc

[App page](https://appshunter.io/ios/app/spicycalc/id6784360950)

This app offers peptide calculators, a reference library, and personal tracking tools for researchers and enthusiasts. It focuses on privacy with all data stored locally and no ads or tracking. Customize your experience with various themes and units.

**Highlights:** Peptide calculators (reconstitution, vial tracker, nasal spray), 50-peptide reference database, Educational guides on peptide use, Personal tracking (water intake, nutrition, body metrics), Cycle planner, Local data storage, Customizable themes and units

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $9.99 | one-time |


## Frequently asked questions

### Is Stackr free?

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

### Is SpicyCalc free?

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

### Which has better reviews, Stackr or SpicyCalc?

SpicyCalc is rated higher. Stackr averages 4.4 out of 5 from 143 ratings, while SpicyCalc averages 5.0 from 1 ratings.

### Do Stackr or SpicyCalc have ads?

Neither Stackr nor SpicyCalc shows ads.

### Which is updated more often, Stackr or SpicyCalc?

Stackr ships an update every 4 days, and SpicyCalc every 4 days. Most recently, Stackr was updated on October 13, 2026 and SpicyCalc on September 21, 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.*