# Str8ts Solver vs VariantDoku

The clearest difference is price: VariantDoku at Free against Str8ts Solver's $2.99. VariantDoku also leads on review sentiment (75% vs 43%) and update cadence (every 8 days vs every 17 months). Str8ts Solver's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

VariantDoku is free to download; Str8ts Solver costs $2.99 up front. VariantDoku sells 3 in-app purchases, starting at $4.99 per month. Str8ts Solver asks for nothing beyond the download.

Str8ts Solver ships an update every 17 months, VariantDoku every 8 days. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Str8ts Solver | VariantDoku |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.9 (7 ratings)](https://appshunter.io/ios/app/variantdoku-variant-sudoku/id6763799102/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 42.9% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 8 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 17 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Th. Wolf](https://appshunter.io/developer/1440178074) | [Uladzislau Artsemyeu](https://appshunter.io/developer/1853525975) |

## What reviewers say

### Str8ts Solver

[App page](https://appshunter.io/ios/app/str8ts-solver/id1452058653)

Solve logic puzzles similar to Sudoku by filling grids with numbers 1-9. Offers daily new puzzles of varying difficulty, an integrated solver for hints, and the ability to manually input or import puzzles.

**Highlights:** Daily new puzzles, Multiple difficulty levels, Integrated solver, Manual puzzle entry, Text format import

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

**In-app purchases:** none


### VariantDoku

[App page](https://appshunter.io/ios/app/variantdoku-variant-sudoku/id6763799102)

This app offers a vast library of over 3,000 logic-based variant Sudoku puzzles, including Killer, Kropki, and zero-givens. It features interactive tutorials, advanced solving tools, and accessibility options like VoiceOver and color-blind support. Enjoy a pure logic experience with no ads or guessing required.

**Highlights:** 3,000+ variant and zero-givens puzzles, Logic-checked for single solutions, Interactive tutorials for all variants, Advanced solving tools (notes, colors, symbols), VoiceOver and color-blind support, Daily puzzle with leaderboard, Home-screen widget

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Variant+ Monthly | $4.99 | per month |
| Variant+ Annual | $24.99 | per year |
| Variant+ Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Str8ts Solver free?

Str8ts Solver costs $2.99, with no in-app purchases.

### Is VariantDoku free?

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

### Do Str8ts Solver or VariantDoku have ads?

Neither Str8ts Solver nor VariantDoku shows ads.

### Which is updated more often, Str8ts Solver or VariantDoku?

Str8ts Solver ships an update every 17 months, and VariantDoku every 8 days. Most recently, Str8ts Solver was updated on November 6, 2026 and VariantDoku on November 9, 2026.

---

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