# Injectly vs Kairo

The clearest difference is in-app purchases: Injectly at none against Kairo's 2. Injectly also leads on ratings volume (492 vs 11) and iOS requirement (15.0 vs 18.0). Kairo's advantage is update cadence (every 2 days vs every 2 weeks) and review sentiment (100% vs 88%). On price, rating, ads and device support there is nothing between them.

Both are free to download. Kairo sells 2 in-app purchases, starting at $9.99 per month. Injectly asks for nothing beyond the download.

Injectly holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Injectly has 492 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 88% of Injectly's written reviews are positive against 100% of Kairo's, so the app with the better star average is not the one people write more warmly about.

Injectly ships an update every 2 weeks, Kairo every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Injectly | Kairo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (492 ratings)](https://appshunter.io/ios/app/injectly/id6745237189/reviews)** | [4.7 (11 ratings)](https://appshunter.io/ios/app/kairo-glp-1-and-peptide-tracker/id6769094182/reviews) |
| Number of ratings | **492** | 11 |
| Positive reviews | 88.2% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 48 MB | 26 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Matthias Gattermeier](https://appshunter.io/developer/1811476841) | [Opportune Labs LLC](https://appshunter.io/developer/1896629486) |

## What reviewers say

### Injectly

[App page](https://appshunter.io/ios/app/injectly/id6745237189)

This app helps you track injectable medications, including weight, peptides, and GLP. Log injections, set reminders, and view your history. Optional account syncs data across devices and offers advanced scheduling. Gain insights into medication levels and active doses.

**Highlights:** Log injectable medication doses, Set custom reminders, View injection history (calendar/list), Cross-device data sync, Advanced scheduling options, Serum concentration insights, Data export and deletion

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

**In-app purchases:** none


### Kairo

[App page](https://appshunter.io/ios/app/kairo-glp-1-and-peptide-tracker/id6769094182)

This app is a comprehensive companion for individuals using GLP-1 medications. It helps track medication, nutrition, training, and labs, offering personalized insights and an AI coach to support your health journey.

**Highlights:** Medication logging with in-body estimates, Muscle preservation tracking, AI-powered personalized coaching, Nutrition tracking with food database, Guided workout programs, Blood work analysis and explanation, Daily readiness and pattern insights

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MomentumRx Pro | $9.99 | per month |
| MomentumRx Pro — Annual | $69.99 | per year |


## Frequently asked questions

### Is Injectly free?

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

### Is Kairo free?

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

### Which has better reviews, Injectly or Kairo?

Injectly is rated higher. Injectly averages 4.9 out of 5 from 492 ratings, while Kairo averages 4.7 from 11 ratings.

### Do Injectly or Kairo have ads?

Neither Injectly nor Kairo shows ads.

### Which is updated more often, Injectly or Kairo?

Injectly ships an update every 2 weeks, and Kairo every 2 days. Most recently, Injectly was updated on November 5, 2026 and Kairo 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.*