# Sleek vs Grindcalculator

The clearest difference is price: Sleek at Free against Grindcalculator's $6.99. Sleek also leads on rating (5.0 vs 1.0) and ratings volume (6 vs 1). Grindcalculator's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support there is nothing between them.

Sleek is free to download; Grindcalculator costs $6.99 up front. Sleek sells 3 in-app purchases, starting at $1.99 per month. Grindcalculator asks for nothing beyond the download.

Sleek holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Sleek has 6 ratings behind it against 1, so its average is the more settled of the two.

Sleek ships an update every 2 months, Grindcalculator every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Sleek | Grindcalculator |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sleek-to-do-and-task-manager/id1591685140/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/grindcalculator/id1660469778/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | — | 84.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | **Freemium** | Paid |
| Size | 23 MB | 9 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Kapps LLC](https://appshunter.io/developer/1591685142) | [RoWo UG](https://appshunter.io/developer/1660469780) |

## What reviewers say

### 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 |


### Grindcalculator

[App page](https://appshunter.io/ios/app/grindcalculator/id1660469778)

This tool simplifies knife sharpening by calculating the correct angle, eliminating the need for manual marking. Save custom sharpening angles and grinding wheel dimensions for consistent results across various brands and types of sharpening tools.

**Highlights:** Precise angle calculation, Eliminates manual marking, Save custom angles, Save grinding wheel dimensions, Supports all grinder brands, Offline functionality

**In-app purchases:** none


## Frequently asked questions

### Is Sleek free?

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

### Is Grindcalculator free?

Grindcalculator costs $6.99, with no in-app purchases.

### Which has better reviews, Sleek or Grindcalculator?

Sleek is rated higher. Sleek averages 5.0 out of 5 from 6 ratings, while Grindcalculator averages 1.0 from 1 ratings.

### Do Sleek or Grindcalculator have ads?

Sleek shows ads; Grindcalculator does not.

### Which is updated more often, Sleek or Grindcalculator?

Sleek ships an update every 2 months, and Grindcalculator every 4 days. Most recently, Sleek was updated on October 24, 2026 and Grindcalculator 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.*