# Staircase Mojo (metric) vs Reefability

The clearest difference is price: Reefability at Free against Staircase Mojo (metric)'s $1.99. Reefability also leads on rating (3.3 vs 1.0) and update cadence (daily vs every 64 months). Staircase Mojo (metric)'s advantage is review sentiment (80% vs 42%) and in-app purchases (none vs 9). On ads there is nothing between them.

Reefability is free to download; Staircase Mojo (metric) costs $1.99 up front. Reefability sells 9 in-app purchases, starting at $9.99 per month. Staircase Mojo (metric) asks for nothing beyond the download.

Reefability holds the better App Store score, 3.3 against 1.0. That said, the two scores are not equally well evidenced: Reefability has 39 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 80% of Staircase Mojo (metric)'s written reviews are positive against 42% of Reefability's, so the app with the better star average is not the one people write more warmly about.

Staircase Mojo (metric) ships an update every 64 months, Reefability daily. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Staircase Mojo (metric) | Reefability |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/staircase-mojo-metric/id932974994/reviews) | **[3.3 (39 ratings)](https://appshunter.io/ios/app/reefability/id6636472070/reviews)** |
| Number of ratings | 1 | **39** |
| Positive reviews | **80.0% of reviews** | 41.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 64 months | **Daily** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 103 MB | 123 MB |
| Requires iOS | **13.0** | 15.0.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Summers](https://appshunter.io/developer/573034758) | [Reefability](https://appshunter.io/developer/1762764786) |

## What reviewers say

### Staircase Mojo (metric)

[App page](https://appshunter.io/ios/app/staircase-mojo-metric/id932974994)

Easily calculate spindle spacings for staircases and other regular spacing needs. Automatically determines stair angle and provides precise measurements adjusted for slope, with options to tweak maximum spacing for custom profiles.

**Highlights:** Automatic stair angle detection, Precise spindle spacing calculation, Adjustable maximum spacing, Slope-adjusted measurements, Easy-to-use interface

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

**In-app purchases:** none


### Reefability

[App page](https://appshunter.io/ios/app/reefability/id6636472070)

This app helps manage complex reef aquariums by integrating chemistry, livestock, lighting, and flow data. It provides AI-driven insights, guided setup, and pest identification to optimize tank health and coral growth.

**Highlights:** AI-driven reef tank analysis, Guided tank setup and cycling modes, 3D reef map with PAR and flow estimation, Chemistry logging via voice or photo, Dosing suggestions and supplement tracking, Livestock care sheets and compatibility reports, Pest identification and tracking, Weather and safety alerts

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month | $9.99 | per month |
| Controller plan (monthly) | $11.99 | per month |
| 12-Month | $34.99 | per year |
| Controller plan (annual) | $49.99 | per year |
| Day pass | $1.99 | one-time |
| 5 tank rebuilds | $2.99 | one-time |
| Week pass | $4.99 | one-time |
| 15 tank rebuilds | $6.99 | one-time |
| Month pass | $12.99 | one-time |


## Frequently asked questions

### Is Staircase Mojo (metric) free?

Staircase Mojo (metric) costs $1.99, with no in-app purchases.

### Is Reefability free?

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

### Which has better reviews, Staircase Mojo (metric) or Reefability?

Reefability is rated higher. Staircase Mojo (metric) averages 1.0 out of 5 from 1 ratings, while Reefability averages 3.3 from 39 ratings.

### Do Staircase Mojo (metric) or Reefability have ads?

Neither Staircase Mojo (metric) nor Reefability shows ads.

### Which is updated more often, Staircase Mojo (metric) or Reefability?

Staircase Mojo (metric) ships an update every 64 months, and Reefability daily. Most recently, Staircase Mojo (metric) was updated on October 29, 2026 and Reefability on October 30, 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.*