# SlipStick vs Asteroid Close Approach

The clearest difference is review sentiment: SlipStick at 83% against Asteroid Close Approach's 0%. SlipStick also leads on update cadence (weekly vs every 4 weeks) and chart position (#188 vs unranked). On ads, in-app purchases, monetization model and device support there is nothing between them.

SlipStick costs $0.99 and Asteroid Close Approach $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SlipStick ships an update weekly, Asteroid Close Approach every 4 weeks. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | SlipStick | Asteroid Close Approach |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/slipstick/id1523544516/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **83.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 weeks |
| Monetization | Paid | Paid |
| Best chart rank | **#188** | — |
| Size | 1 MB | 34 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Steve Glenner](https://appshunter.io/developer/1518671062) | [Arpacore B.V.](https://appshunter.io/developer/1441928570) |

## What reviewers say

### SlipStick

[App page](https://appshunter.io/ios/app/slipstick/id1523544516)

**Currently charting:** #188 Top Paid · Education (US App Store)

This app is a fully functional digital reproduction of a classic engineering slide rule. It allows users to perform complex calculations like multiplication, division, logarithms, and trigonometry, just like the original manual tool.

**Highlights:** Virtual slide rule reproduction, Multiplication and division, Logarithm calculations, Trigonometry calculations, Classic engineering tool

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

**In-app purchases:** none


### Asteroid Close Approach

[App page](https://appshunter.io/ios/app/asteroid-close-approach/id1562569488)

Get real-time updates on near-Earth asteroid close approaches, including dates, distances, and impact energies. Access NASA's Sentry database for collision predictions and use a built-in calculator to estimate asteroid mass and energy.

**Highlights:** Real-time asteroid data on Apple Watch, Comprehensive approach details, Access to NASA's Sentry database, Asteroid mass and energy calculator, Collision monitoring for the next century

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is SlipStick free?

SlipStick costs $0.99, with no in-app purchases.

### Is Asteroid Close Approach free?

Asteroid Close Approach costs $1.99, with no in-app purchases.

### Do SlipStick or Asteroid Close Approach have ads?

Neither SlipStick nor Asteroid Close Approach shows ads.

### Which is updated more often, SlipStick or Asteroid Close Approach?

SlipStick ships an update weekly, and Asteroid Close Approach every 4 weeks. Most recently, SlipStick was updated on October 25, 2026 and Asteroid Close Approach on October 9, 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.*