# Shadow OS vs Sidera

The clearest difference is iOS requirement: Shadow OS at 15.1 against Sidera's 17.0. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Shadow OS sells 3 in-app purchases, starting at $9.99 per month and Sidera sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Shadow OS against 4.8 for Sidera. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Shadow OS ships an update every 6 days, Sidera weekly. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Shadow OS | Sidera |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/shadow-os/id6757407948/reviews) | [4.8 (6 ratings)](https://appshunter.io/ios/app/sidera-guidance/id6762301629/reviews) |
| Number of ratings | 4 | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 52 MB | 72 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Phonix & Aura LLC](https://appshunter.io/developer/1866703420) | [Sidera LLC](https://appshunter.io/developer/1893721198) |

## What reviewers say

### Shadow OS

[App page](https://appshunter.io/ios/app/shadow-os/id6757407948)

This app helps you understand your personal patterns by tracking your choices, habits, and daily signals. It provides weekly and monthly insights into what connects, repeats, and changes in your behavior, offering a data-driven approach to self-awareness without dictating actions.

**Highlights:** Track daily signals and check-ins, Analyze habits and timing, Receive weekly and monthly reads, Explore Jung-inspired archetypes, Compare baseline to actual choices, View evidence behind insights

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shadow OS Premium | $9.99 | per month |
| Shadow OS Annual | $79.99 | per year |
| Shadow OS Lifetime | $129.00 | one-time |


### Sidera

[App page](https://appshunter.io/ios/app/sidera-guidance/id6762301629)

This lifestyle app connects you with experts for practical guidance on everyday decisions. Move from overthinking to action by defining priorities, creating action plans, and preparing for important conversations. Build better habits and track your progress in one place for personal growth.

**Highlights:** Chat with life and love advisors, Define priorities and action plans, Prepare for important conversations, Build better habits, Track sessions and progress

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welcome Offer: Credits | $2.99 | one-time |
| Basic Credits Package | $11.99 | one-time |
| Bronze Credits | $19.99 | one-time |
| Silver Credits | $49.99 | one-time |
| Gold Credits | $99.99 | one-time |
| Platinum Credits | $149.99 | one-time |
| Diamond Credits | $199.99 | one-time |
| Cosmic Credits | $249.99 | one-time |


## Frequently asked questions

### Is Shadow OS free?

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

### Is Sidera free?

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

### Which has better reviews, Shadow OS or Sidera?

Shadow OS and Sidera are both rated 4.8 out of 5 on the App Store, from 4 and 6 ratings respectively.

### Do Shadow OS or Sidera have ads?

Neither Shadow OS nor Sidera shows ads.

### Which is updated more often, Shadow OS or Sidera?

Shadow OS ships an update every 6 days, and Sidera weekly. Most recently, Shadow OS was updated on October 6, 2026 and Sidera on October 12, 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.*