# ThinkGrid vs Lightkeeper

The clearest difference is update cadence: Lightkeeper at every 3 weeks against ThinkGrid's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ThinkGrid sells 5 in-app purchases, starting at $17.99 per year and Lightkeeper sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ThinkGrid ships an update every 3 months, Lightkeeper every 3 weeks. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ThinkGrid | Lightkeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thinkgrid-calm-logic-puzzles/id6774161184/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 40 MB | 134 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [De Appmakers](https://appshunter.io/developer/6774161186) | [MEHMET CANKER (TR)](https://appshunter.io/developer/1565350155) |

## What reviewers say

### ThinkGrid

[App page](https://appshunter.io/ios/app/thinkgrid-calm-logic-puzzles/id6774161184)

Engage your logic with eleven unique grid-based puzzles. Enjoy a completely ad-free experience with no timers or energy restrictions, offering a pure mental challenge. Explore multiple difficulty levels and daily puzzles with optional premium features for advanced insights.

**Highlights:** Eleven unique logic puzzles, No ads, timers, or energy bars, Daily generated puzzles, Six difficulty levels, Step-by-step puzzle guides, Optional premium features, Multiple color themes

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThinkGrid Plus Yearly | $17.99 | per year |
| ThinkGrid Tip Espresso | $1.99 | one-time |
| ThinkGrid Tip Latte | $3.99 | one-time |
| ThinkGrid Tip Pot | $8.99 | one-time |
| ThinkGrid Plus Lifetime | $29.99 | one-time |


### Lightkeeper

[App page](https://appshunter.io/ios/app/lightkeeper-nonogram-story/id6795631630)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Lights | $0.99 | one-time |
| 25 Hints | $1.99 | one-time |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is ThinkGrid free?

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

### Is Lightkeeper free?

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

### Do ThinkGrid or Lightkeeper have ads?

Neither ThinkGrid nor Lightkeeper shows ads.

### Which is updated more often, ThinkGrid or Lightkeeper?

ThinkGrid ships an update every 3 months, and Lightkeeper every 3 weeks. Most recently, ThinkGrid was updated on October 31, 2026 and Lightkeeper on October 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.*