Comparison

Sigma vs TheStrangerX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sigma

Read full description

Multi Featured calculator app - with an entertaining bonus feature to mess with your friends! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

TheStrangerX

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
Read full description

The Stranger, reborn. Same impossible impact. Streamlined, expanded, and finally as easy as it should have been. Stranger X is a performance tool for magicians and mentalists. A spectator picks up a phone, dials a number nobody could have known, and hears a stranger tell them the thing they only just thought of. NEW IN X Conversation Recordings, made in the app. Record directly in Stranger X. No separate studio, no importing files, no workaround. The single largest ease-of-use gain in the release. The Marketplace Publish your recordings for other performers to find, and download theirs. Search by title, author, region or tag. A library that grows without you. AI transcripts Generate a transcript of any recording automatically, using your own API key. Community, from inside the app Regional groups, announcements and support without leaving Stranger X. Borrowed Phone Place the call from a spectator's own phone. EVERYTHING THE STRANGER ALWAYS DID Live Stranger Calls. A real person, on a real call, anywhere in the world. Conversation Recordings. The same impact with nobody else awake. Auto Advance and Fallback. The call cycles through your list until someone answers. Convincers. Voicemail and auto-disconnect passes that make the dial feel ordinary. Smart region awareness. Correct numbers and formats wherever you are, in thirty languages. BUILT FOR PERFORMERS Drag to reorder your Strangers. Tap one to make it default. Switch anyone off for the night. Choose your reveal mode, your call type and your convincers from a single screen, then perform. Practice and Tutorials are built in. Rehearse against a recording before you ever do it for a person, and every lesson sits one tap from the screen it explains. Seven years. Thousands of performers. Regional communities across four continents. The Stranger, reborn.

Screenshots

Sigma4 screens
TheStrangerX4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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

Scorecard2 real differences · 8 level
Sigma versus TheStrangerX: the parameters behind the verdict, then further details
ParameterSigmaTheStrangerX
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhoneiPhone
Requires iOS18.0 — better18.6
Further details — not scored
Size7 MB81 MB
Age rating4+17+
DeveloperMAJOR Productions LLCJonathan Levit Consulting

In-app purchases

None

Sigma

No in-app purchases

2 purchases

TheStrangerX

One-time2
  • Borrowed Phone$149.00
  • StrangerX Full Unlock$299.00

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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