# Thetis Tools vs Sleek

The clearest difference is in-app purchases: Thetis Tools at none against Sleek's 4. Thetis Tools also leads on ads (none vs shown) and device support (3 vs 1). Sleek's advantage is update cadence (every 2 months vs every 7 months). On price there is nothing between them.

Both are free to download. Sleek sells 3 in-app purchases, starting at $1.99 per month. Thetis Tools asks for nothing beyond the download.

Thetis Tools ships an update every 7 months, Sleek every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Thetis Tools | Sleek |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sleek-to-do-and-task-manager/id1591685140/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | — | Freemium |
| Size | 50 MB | 23 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thetis srl](https://appshunter.io/developer/397584184) | [Kapps LLC](https://appshunter.io/developer/1591685142) |

## What reviewers say

### Thetis Tools

[App page](https://appshunter.io/ios/app/thetis-tools/id1460268980)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sleek

[App page](https://appshunter.io/ios/app/sleek-to-do-and-task-manager/id1591685140)

Organize your life with color-coded lists, priorities, and smart reminders. Capture ideas quickly and never forget important tasks with customizable notifications and widgets. Protect your private lists with biometric security.

**Highlights:** Color-coded task lists, Priority setting, Due dates and reminders, Notes and attachments, Quick task capture, Customizable themes and fonts, Biometric list locking

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $17.99 | per year |
| Become a PRO Sleek user | $4.99 | one-time |


## Frequently asked questions

### Is Thetis Tools free?

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

### Is Sleek free?

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

### Do Thetis Tools or Sleek have ads?

Sleek shows ads; Thetis Tools does not.

### Which is updated more often, Thetis Tools or Sleek?

Thetis Tools ships an update every 7 months, and Sleek every 2 months. Most recently, Thetis Tools was updated on October 26, 2026 and Sleek 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.*