# Детектор Лжи I.S.L vs FlatHub

The clearest difference is price: FlatHub at Free against Детектор Лжи I.S.L's $8.99. FlatHub also leads on update cadence (every 3 weeks vs every 5 months). Детектор Лжи I.S.L's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 15.3). On ads and device support there is nothing between them.

FlatHub is free to download; Детектор Лжи I.S.L costs $8.99 up front. FlatHub sells 3 in-app purchases, starting at $1.99 per 7 days. Детектор Лжи I.S.L asks for nothing beyond the download.

Детектор Лжи I.S.L ships an update every 5 months, FlatHub every 3 weeks. The most recent releases landed on September 27, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Детектор Лжи I.S.L | FlatHub |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/isl/id1611247031/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 245 MB |
| Requires iOS | **13.0** | 15.3 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [ALGORITHM LLC apps](https://appshunter.io/developer/1459520987) | [Ilya Hanchar](https://appshunter.io/developer/1853686682) |

## What reviewers say

### Детектор Лжи I.S.L

[App page](https://appshunter.io/ios/app/isl/id1611247031)

This app uses unique technologies and physiological data to estimate the likelihood of deception. It is intended for entertainment purposes only and is not a professional lie detector. Users must obtain consent before testing.

**Highlights:** Estimates deception using physiological data, Developed with professional psychologists, Entertainment purposes only, Requires user consent for testing, Not a professional polygraph

**Features:** macOS Compatibility

**In-app purchases:** none


### FlatHub

[App page](https://appshunter.io/ios/app/flathub/id6755496332)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlatHub premium - 1 week | $1.99 | per 7 days |
| FlatHub premium - 1 month | $3.99 | per month |
| FlatHub premium - 3 month | $8.99 | per 3 months |


## Frequently asked questions

### Is Детектор Лжи I.S.L free?

Детектор Лжи I.S.L costs $8.99, with no in-app purchases.

### Is FlatHub free?

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

### Do Детектор Лжи I.S.L or FlatHub have ads?

Both Детектор Лжи I.S.L and FlatHub show ads.

### Which is updated more often, Детектор Лжи I.S.L or FlatHub?

Детектор Лжи I.S.L ships an update every 5 months, and FlatHub every 3 weeks. Most recently, Детектор Лжи I.S.L was updated on September 27, 2026 and FlatHub on September 29, 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.*