# Regimen vs fillin

The clearest difference is in-app purchases: fillin at none against Regimen's 2. Regimen's advantage is update cadence (every 9 days vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Regimen sells 2 in-app purchases, starting at $7.99 per month. fillin asks for nothing beyond the download.

Regimen ships an update every 9 days, fillin every 2 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Regimen | fillin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (574 ratings)](https://appshunter.io/ios/app/regimen-peptide-tracker/id6753905449/reviews)** | — |
| Number of ratings | **574** | — |
| Positive reviews | 94.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 27 MB | 10 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Awaken Labs LLC](https://appshunter.io/developer/1845610555) | [Aimgonna Inc.](https://appshunter.io/developer/6780927794) |

## What reviewers say

### Regimen

[App page](https://appshunter.io/ios/app/regimen-peptide-tracker/id6753905449)

Log injections, doses, side effects, and weight for GLP-1, TRT, HRT, and peptide medications. Plan schedules, rotate injection sites, track vials, bloodwork, and nutrition. Syncs with Apple Health and offers a compound library.

**Highlights:** Log injections and doses, Track side effects and weight, Schedule custom dosing, Rotate injection sites, Sync with Apple Health, Monitor bloodwork and labs, Visualize medication levels

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Regimen Premium | $7.99 | per month |
| Regimen Premium Annual | $49.99 | per year |


### fillin

[App page](https://appshunter.io/ios/app/fillin-supplement-tracker/id6780927792)

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

**In-app purchases:** none


## Frequently asked questions

### Is Regimen free?

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

### Is fillin free?

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

### Do Regimen or fillin have ads?

Neither Regimen nor fillin shows ads.

### Which is updated more often, Regimen or fillin?

Regimen ships an update every 9 days, and fillin every 2 months. Most recently, Regimen was updated on November 9, 2026 and fillin on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*