# Peptide Tracker by Peptide AI vs Fit Flex Pass

The clearest difference is rating: Fit Flex Pass at 5.0 against Peptide Tracker by Peptide AI's 4.5. Fit Flex Pass also leads on in-app purchases (none vs 4) and iOS requirement (15.1 vs 18.0). Peptide Tracker by Peptide AI's advantage is ratings volume (75 vs 2) and update cadence (weekly vs every 2 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Peptide Tracker by Peptide AI sells 4 in-app purchases, starting at $6.99 per 7 days. Fit Flex Pass asks for nothing beyond the download.

Fit Flex Pass holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Peptide Tracker by Peptide AI has 75 ratings behind it against 2, so its average is the more settled of the two.

Peptide Tracker by Peptide AI ships an update weekly, Fit Flex Pass every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Peptide Tracker by Peptide AI | Fit Flex Pass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (75 ratings)](https://appshunter.io/ios/app/peptide-tracker-by-peptide-ai/id6760374374/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fit-flex-pass/id6795287949/reviews)** |
| Number of ratings | **75** | 2 |
| Positive reviews | 76.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | **Free** |
| Size | 74 MB | 46 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Peptide AI](https://appshunter.io/developer/1884181684) | [Anthony Idi](https://appshunter.io/developer/6788379226) |

## What reviewers say

### Peptide Tracker by Peptide AI

[App page](https://appshunter.io/ios/app/peptide-tracker-by-peptide-ai/id6760374374)

Log peptide and GLP-1 doses, track vial levels, and rotate injection sites. An AI coach analyzes your data and suggests experiments. Sync with wearables and share reports with your clinician.

**Highlights:** Dose logging, Vial level tracking, Injection site rotation, AI coaching, Wearable integration, Dose history export, Widgets and Apple Watch support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $6.99 | per 7 days |
| Premium Monthly | $14.99 | per month |
| Premium Yearly Offer | $29.99 | per year |
| Premium Yearly | $59.99 | per year |


### Fit Flex Pass

[App page](https://appshunter.io/ios/app/fit-flex-pass/id6795287949)

Access independent gyms and book personal trainers without long-term commitments. Purchase one-time passes for day, week, or month access, or book single or pack sessions with trainers. Your account works nationwide, offering flexibility for travel.

**Highlights:** Buy gym day, week, or month passes, Book sessions with personal trainers, One-time purchases, no renewals, Nationwide account access for travel, QR code for gym check-in, Discounted trainer session packs

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

**In-app purchases:** none


## Frequently asked questions

### Is Peptide Tracker by Peptide AI free?

Peptide Tracker by Peptide AI is free to download, with in-app purchases available.

### Is Fit Flex Pass free?

Fit Flex Pass is free to download, with no in-app purchases.

### Which has better reviews, Peptide Tracker by Peptide AI or Fit Flex Pass?

Fit Flex Pass is rated higher. Peptide Tracker by Peptide AI averages 4.5 out of 5 from 75 ratings, while Fit Flex Pass averages 5.0 from 2 ratings.

### Do Peptide Tracker by Peptide AI or Fit Flex Pass have ads?

Neither Peptide Tracker by Peptide AI nor Fit Flex Pass shows ads.

### Which is updated more often, Peptide Tracker by Peptide AI or Fit Flex Pass?

Peptide Tracker by Peptide AI ships an update weekly, and Fit Flex Pass every 2 weeks. Most recently, Peptide Tracker by Peptide AI was updated on November 5, 2026 and Fit Flex Pass on October 31, 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.*