# PepStash vs SelfAssay

The clearest difference is in-app purchases: PepStash at none against SelfAssay's 2. PepStash also leads on update cadence (every 3 days vs every 10 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SelfAssay sells 2 in-app purchases, starting at $19.99 per month. PepStash asks for nothing beyond the download.

PepStash ships an update every 3 days, SelfAssay every 10 days. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | PepStash | SelfAssay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pepstash/id6760975200/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 10 days |
| Monetization | Free | — |
| Size | 3 MB | 67 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Aaron Voges](https://appshunter.io/developer/1866792993) | [Sandro Andric](https://appshunter.io/developer/1868438293) |

## What reviewers say

### PepStash

[App page](https://appshunter.io/ios/app/pepstash/id6760975200)

Manage your peptide inventory, track costs, and log doses with this personal companion app. It helps calculate concentrations, suggests ideal water amounts, and syncs data across household devices via iCloud for seamless sharing and reminders.

**Highlights:** Peptide inventory management, Cost per milligram calculation, Reconstitution concentration calculator, Dose logging with vial tracking, Household data syncing via iCloud, Dose reminders and alerts, Purity test result linking

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

**In-app purchases:** none


### SelfAssay

[App page](https://appshunter.io/ios/app/selfassay/id6779266091)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SelfAssay Pro | $19.99 | per month |
| SelfAssay Pro | $149.99 | per year |


## Frequently asked questions

### Is PepStash free?

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

### Is SelfAssay free?

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

### Do PepStash or SelfAssay have ads?

Neither PepStash nor SelfAssay shows ads.

### Which is updated more often, PepStash or SelfAssay?

PepStash ships an update every 3 days, and SelfAssay every 10 days. Most recently, PepStash was updated on October 10, 2026 and SelfAssay on September 29, 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.*