# PeptidePal vs Strength IO

The clearest difference is rating: Strength IO at 5.0 against PeptidePal's 3.4. Strength IO also leads on update cadence (every 6 days vs fortnightly). PeptidePal's advantage is ratings volume (5 vs 1) and iOS requirement (15.1 vs 26.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. PeptidePal sells 3 in-app purchases, starting at $2.99 per month and Strength IO sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Strength IO holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: PeptidePal has 5 ratings behind it against 1, so its average is the more settled of the two.

PeptidePal ships an update fortnightly, Strength IO every 6 days. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PeptidePal | Strength IO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (5 ratings)](https://appshunter.io/ios/app/peptidepal/id6746348113/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/strength-io-workout-tracker/id6776702706/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Freemium | Freemium |
| Size | 48 MB | 27 MB |
| Requires iOS | **15.1** | 26.4 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [SIGNALWORKS LABS INC.](https://appshunter.io/developer/1816293557) | [Crimson IO LLC](https://appshunter.io/developer/1864406504) |

## What reviewers say

### PeptidePal

[App page](https://appshunter.io/ios/app/peptidepal/id6746348113)

This app helps users meticulously track research peptides, manage inventory, and schedule doses with smart reminders. It also offers new health tracking features for sleep, supplements, and progress monitoring, with secure data syncing and export options.

**Highlights:** Log doses with a simple swipe, Track multiple peptides simultaneously, Organize peptide stock with low stock alerts, Daily or specific day dose reminders, Monitor sleep patterns and quality, Track weight and body measurements, Export data as CSV for analysis

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PeptidePal Pro | $2.99 | per month |
| Peptidepal Yearly | $29.99 | per year |
| PeptidePal Pro | $2.99 | one-time |


### Strength IO

[App page](https://appshunter.io/ios/app/strength-io-workout-tracker/id6776702706)

This app intelligently adapts your strength training sessions based on your daily recovery signals and logged activities from other apps. It analyzes multiple health metrics to determine optimal workout intensity, preventing overtraining and maximizing gains. Track your progress with detailed athlete profiles and personalized insights.

**Highlights:** Adaptive training based on per-muscle recovery, Integrates with Apple Health for activity logging, Readiness score from seven health signals, Training load analysis (7-day vs. 28-day), Smart weekly volume tracking, Comprehensive athlete profile with strength and cardio scores, Private by default, on-device coaching

**Features:** Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strength IO Pro | $9.99 | per month |
| Strength IO Pro | $59.99 | per year |


## Frequently asked questions

### Is PeptidePal free?

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

### Is Strength IO free?

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

### Which has better reviews, PeptidePal or Strength IO?

Strength IO is rated higher. PeptidePal averages 3.4 out of 5 from 5 ratings, while Strength IO averages 5.0 from 1 ratings.

### Do PeptidePal or Strength IO have ads?

Neither PeptidePal nor Strength IO shows ads.

### Which is updated more often, PeptidePal or Strength IO?

PeptidePal ships an update fortnightly, and Strength IO every 6 days. Most recently, PeptidePal was updated on October 15, 2026 and Strength IO on October 10, 2026.

---

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