# Sigma vs TheStrangerX

The clearest difference is in-app purchases: Sigma at none against TheStrangerX's 2. Sigma also leads on update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TheStrangerX sells 2 one-off in-app purchases. Sigma asks for nothing beyond the download.

Sigma ships an update every 4 days, TheStrangerX every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Sigma | TheStrangerX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thestrangerx/id6796238016/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 7 MB | 81 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [MAJOR Productions LLC](https://appshunter.io/developer/1885618341) | [Jonathan Levit Consulting](https://appshunter.io/developer/1397183488) |

## What reviewers say

### Sigma

[App page](https://appshunter.io/ios/app/sigma-calculator/id6760669373)

**In-app purchases:** none


### TheStrangerX

[App page](https://appshunter.io/ios/app/thestrangerx/id6796238016)

This tool enables magicians and mentalists to create impossible effects by having a spectator dial a number and hear a stranger reveal their thoughts. It features conversation recording, a marketplace for sharing performances, AI transcription, and community forums.

**Highlights:** Spectator dials unknown number to hear thoughts revealed, Conversation recording within the app, Marketplace for sharing and downloading performer recordings, AI-generated transcripts of recordings, In-app community forums and groups, Perform from a spectator's borrowed phone, Live stranger calls and auto-advance features

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Borrowed Phone | $149.00 | one-time |
| StrangerX Full Unlock | $299.00 | one-time |


## Frequently asked questions

### Is Sigma free?

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

### Is TheStrangerX free?

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

### Do Sigma or TheStrangerX have ads?

Neither Sigma nor TheStrangerX shows ads.

### Which is updated more often, Sigma or TheStrangerX?

Sigma ships an update every 4 days, and TheStrangerX every 2 weeks. Most recently, Sigma was updated on October 25, 2026 and TheStrangerX on October 25, 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.*