# Fraction as Slope vs Singularity by Vaonis

The clearest difference is price: Singularity by Vaonis at Free against Fraction as Slope's $3.99. Singularity by Vaonis also leads on update cadence (every 5 weeks vs every 22 months) and ratings volume (74 vs 2). Fraction as Slope's advantage is rating (5.0 vs 4.1) and review sentiment (100% vs 64%). On ads and in-app purchases there is nothing between them.

Singularity by Vaonis is free to download; Fraction as Slope costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fraction as Slope holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Singularity by Vaonis has 74 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Fraction as Slope's written reviews are positive against 64% of Singularity by Vaonis's.

Fraction as Slope ships an update every 22 months, Singularity by Vaonis every 5 weeks. The most recent releases landed on June 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fraction as Slope | Singularity by Vaonis |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fraction-as-slope/id1089494423/reviews)** | [4.1 (74 ratings)](https://appshunter.io/ios/app/singularity-by-vaonis/id1515280835/reviews) |
| Number of ratings | 2 | **74** |
| Positive reviews | **100.0% of reviews** | 64.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 401 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Esa Helttula](https://appshunter.io/developer/339440196) | [Vaonis](https://appshunter.io/developer/1369139518) |

## What reviewers say

### Fraction as Slope

[App page](https://appshunter.io/ios/app/fraction-as-slope/id1089494423)

This app offers a visual approach to understanding fractions and slopes through interactive graphing. Students can manipulate lines on a grid to explore fraction equivalence, addition, subtraction, reduction, and expansion.

**Highlights:** Visual fraction and slope exploration, Add and subtract fractions visually, Compare fractions using slopes, Reduce and expand fractions, Explore fraction equivalence

**Features:** macOS Compatibility

**In-app purchases:** none


### Singularity by Vaonis

[App page](https://appshunter.io/ios/app/singularity-by-vaonis/id1515280835)

Control your smart telescope to explore the cosmos. Discover celestial objects with personalized recommendations, capture stunning images of galaxies and nebulae, and share your astronomical journey.

**Highlights:** Automatic setup and alignment, Real-time image processing, Object catalog and coordinate pointing, Mosaic mode for wider views, Solar observation mode, Expert mode for advanced control, Night planning and automated exploration

**In-app purchases:** none


## Frequently asked questions

### Is Fraction as Slope free?

Fraction as Slope costs $3.99, with no in-app purchases.

### Is Singularity by Vaonis free?

Singularity by Vaonis is free to download, with no in-app purchases.

### Which has better reviews, Fraction as Slope or Singularity by Vaonis?

Fraction as Slope is rated higher. Fraction as Slope averages 5.0 out of 5 from 2 ratings, while Singularity by Vaonis averages 4.1 from 74 ratings.

### Do Fraction as Slope or Singularity by Vaonis have ads?

Neither Fraction as Slope nor Singularity by Vaonis shows ads.

### Which is updated more often, Fraction as Slope or Singularity by Vaonis?

Fraction as Slope ships an update every 22 months, and Singularity by Vaonis every 5 weeks. Most recently, Fraction as Slope was updated on June 7, 2026 and Singularity by Vaonis on October 14, 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.*