# Детектор Лжи I.S.L vs Добросервис

The clearest difference is price: Добросервис at Free against Детектор Лжи I.S.L's $8.99. Добросервис also leads on ads (none vs shown) and update cadence (fortnightly vs every 5 months). Детектор Лжи I.S.L's advantage is rating (4.0 vs 3.0) and review sentiment (86% vs 57%). On ratings volume, in-app purchases and device support there is nothing between them.

Добросервис is free to download; Детектор Лжи I.S.L costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Детектор Лжи I.S.L holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 86% of Детектор Лжи I.S.L's written reviews are positive against 57% of Добросервис's.

Детектор Лжи I.S.L ships an update every 5 months, Добросервис fortnightly. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Детектор Лжи I.S.L | Добросервис |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/isl/id1611247031/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/id1658272199/reviews) |
| Number of ratings | 4 | 4 |
| Positive reviews | **85.7% of reviews** | 56.8% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 95 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 17+ |
| Developer | [ALGORITHM LLC apps](https://appshunter.io/developer/1459520987) | [ELS24](https://appshunter.io/developer/1296726232) |

## 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


### Добросервис

[App page](https://appshunter.io/ios/app/id1658272199)

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

**In-app purchases:** none


## Frequently asked questions

### Is Детектор Лжи I.S.L free?

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

### Is Добросервис free?

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

### Which has better reviews, Детектор Лжи I.S.L or Добросервис?

Детектор Лжи I.S.L is rated higher. Детектор Лжи I.S.L averages 4.0 out of 5 from 4 ratings, while Добросервис averages 3.0 from 4 ratings.

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

Детектор Лжи I.S.L shows ads; Добросервис does not.

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

Детектор Лжи I.S.L ships an update every 5 months, and Добросервис fortnightly. Most recently, Детектор Лжи I.S.L was updated on October 12, 2026 and Добросервис on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*