# LogicSums vs iStroopChallenge

The clearest difference is ads: iStroopChallenge at none against LogicSums's shown. iStroopChallenge also leads on update cadence (every 6 days vs fortnightly) and monetization model (free vs ad-supported). LogicSums's advantage is iOS requirement (13.0 vs 15.0). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LogicSums ships an update fortnightly, iStroopChallenge every 6 days. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | LogicSums | iStroopChallenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/istroopchallenge/id6755783575/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Ad-supported | **Free** |
| Size | 100 MB | 24 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Skillshot Games LLC](https://appshunter.io/developer/1700568662) | [Steve Hunger](https://appshunter.io/developer/1840531947) |

## What reviewers say

### LogicSums

[App page](https://appshunter.io/ios/app/logicsums/id6741501245)

Engage in logic-based math puzzles by arranging numbers in a grid to meet target sums. This game offers endless challenges for brain training and mental workouts, perfect for puzzle enthusiasts.

**Highlights:** Logic-based math puzzles, Number arrangement in grids, Target sum matching, Limited guesses per puzzle, Win and streak tracking, Fastest solve time recording

**Features:** macOS Compatibility

**In-app purchases:** none


### iStroopChallenge

[App page](https://appshunter.io/ios/app/istroopchallenge/id6755783575)

Engage in a classic psychological test transformed into an addictive mobile game. Challenge your cognitive speed by identifying ink colors, not word meanings, in a fun and effective brain training experience.

**Highlights:** Timed and endless game modes, Adaptive difficulty settings, Multiplayer challenges, Achievements and leaderboards, Color blind accessibility, Multiple themes, Detailed statistics

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

**In-app purchases:** none


## Frequently asked questions

### Is LogicSums free?

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

### Is iStroopChallenge free?

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

### Do LogicSums or iStroopChallenge have ads?

LogicSums shows ads; iStroopChallenge does not.

### Which is updated more often, LogicSums or iStroopChallenge?

LogicSums ships an update fortnightly, and iStroopChallenge every 6 days. Most recently, LogicSums was updated on October 10, 2026 and iStroopChallenge on October 14, 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.*