# Thermometers vs Sky Grid

The clearest difference is in-app purchases: Sky Grid at none against Thermometers's 3. Sky Grid also leads on ads (none vs shown) and update cadence (every 5 days vs fortnightly). Thermometers's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Thermometers sells 3 in-app purchases, starting at $1.99 per 7 days. Sky Grid asks for nothing beyond the download.

Thermometers ships an update fortnightly, Sky Grid every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Thermometers | Sky Grid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/thermometers-logic-puzzles/id6739959033/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 131 MB | 8 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Feng Xia](https://appshunter.io/developer/1387862762) | [ERDINC YILMAZ](https://appshunter.io/developer/1863747719) |

## What reviewers say

### Thermometers

[App page](https://appshunter.io/ios/app/thermometers-logic-puzzles/id6739959033)

A minimalist logic game where you fill thermometers based on row and column hints. It offers hundreds of levels with gradually increasing difficulty, designed to train your logic skills. Enjoy a clean interface and precise controls for an engaging puzzle experience.

**Highlights:** Fill thermometers based on hints, Hundreds of levels, Clean and intuitive design, Precision drag-and-fill controls, Offline play, Gradual difficulty progression

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership Subscription | $1.99 | per 7 days |
| Month Membership Subscription | $3.99 | per month |
| Remove ads pack | $3.99 | one-time |


### Sky Grid

[App page](https://appshunter.io/ios/app/sky-grid/id6761081180)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thermometers free?

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

### Is Sky Grid free?

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

### Do Thermometers or Sky Grid have ads?

Thermometers shows ads; Sky Grid does not.

### Which is updated more often, Thermometers or Sky Grid?

Thermometers ships an update fortnightly, and Sky Grid every 5 days. Most recently, Thermometers was updated on October 24, 2026 and Sky Grid on October 24, 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.*