# Hello Inside vs Caelyn

Hello Inside and Caelyn both sit at 5.0 stars, but that hides the real split: 100% of Caelyn's written reviews are positive against 63% of Hello Inside's. Caelyn also leads on update cadence (every 2 days vs every 4 days). Hello Inside's advantage is iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Hello Inside sells 2 in-app purchases, starting at $34.99 per month and Caelyn sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Hello Inside against 5.0 for Caelyn. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 63% of Hello Inside's written reviews are positive against 100% of Caelyn's.

Hello Inside ships an update every 4 days, Caelyn every 2 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Hello Inside | Caelyn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/hello-inside/id1577156704/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/caelyn-period-and-cycle-tracker/id6764264949/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 62.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 133 MB | 10 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Hello Inside](https://appshunter.io/developer/1577156886) | [Rajesh Panta](https://appshunter.io/developer/1784818219) |

## What reviewers say

### Hello Inside

[App page](https://appshunter.io/ios/app/hello-inside/id1577156704)

This app offers a holistic approach to women's metabolism and well-being, utilizing continuous glucose monitoring (CGM) to provide insights into hormonal imbalances. It helps manage symptoms related to PMS, menopause, and other hormone disorders through personalized recommendations and educational programs.

**Highlights:** Continuous glucose monitoring (CGM) integration, Insights into female metabolism and hormonal imbalances, Personalized recommendations for PMS and menopause, Blood sugar monitoring and stabilization, Educational programs on hormones and menopause, Activity and journaling for tracking habits

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Only Monthly Subscription | $34.99 | per month |
| App Only Yearly Subscription | $174.99 | per year |


### Caelyn

[App page](https://appshunter.io/ios/app/caelyn-period-and-cycle-tracker/id6764264949)

This period tracker learns your unique cycle patterns and keeps all your health data private on your device. It offers detailed insights into your cycle, symptoms, and mood, with robust privacy features and an optional Pro version for advanced analytics.

**Highlights:** Personalized cycle learning, Detailed symptom and mood logging, On-device data storage, Privacy-focused design, Cycle pattern insights, Data export (CSV/PDF), Apple Health integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Yearly | $19.99 | per year |
| Pro Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is Hello Inside free?

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

### Is Caelyn free?

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

### Which has better reviews, Hello Inside or Caelyn?

Hello Inside and Caelyn are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Hello Inside or Caelyn have ads?

Neither Hello Inside nor Caelyn shows ads.

### Which is updated more often, Hello Inside or Caelyn?

Hello Inside ships an update every 4 days, and Caelyn every 2 days. Most recently, Hello Inside was updated on October 27, 2026 and Caelyn on October 24, 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.*