# iA Writer vs RayCrest Lab Calculator

The clearest difference is price: RayCrest Lab Calculator at Free against iA Writer's $19.99. iA Writer's advantage is ratings volume (1.5K vs 3) and update cadence (every 2 weeks vs every 2 months). On rating, ads, in-app purchases and device support there is nothing between them.

RayCrest Lab Calculator is free to download; iA Writer costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for iA Writer against 4.7 for RayCrest Lab Calculator. That said, the two scores are not equally well evidenced: iA Writer has 1.5K ratings behind it against 3, so its average is the more settled of the two.

iA Writer ships an update every 2 weeks, RayCrest Lab Calculator every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iA Writer | RayCrest Lab Calculator |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [4.6 (1.5K ratings)](https://appshunter.io/ios/app/ia-writer/id775737172/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/raycrest-lab-calculator/id6785651551/reviews)** |
| Number of ratings | **1.5K** | 3 |
| Positive reviews | 73.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#32** | — |
| Size | 70 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Information Architects AG](https://appshunter.io/developer/775737175) | [RAYCREST SOFTWARE LLC](https://appshunter.io/developer/1847966144) |

## What reviewers say

### iA Writer

[App page](https://appshunter.io/ios/app/ia-writer/id775737172)

**Currently charting:** #32 Top Paid · Productivity (US App Store)

A distraction-free writing environment designed to help you focus on your words. It offers features like Focus Mode, plain text writing with HTML preview, and robust organization tools. Customize your writing experience and export to various formats.

**Highlights:** Distraction-free writing environment, Focus Mode for enhanced concentration, Plain text writing with HTML preview, Document organization and search, Customizable keyboard layout, Export to various formats (Word, PDF, HTML, WordPress, Medium)

**In-app purchases:** none

**What reviewers like**

- 🚀 Distraction-free writing experience
- 👍 Elegant and minimalist design
- 💡 Helpful syntax highlighting and formatting tools
- 🚀 Seamless sync across devices
- 👍 Reliable and stable performance

**What reviewers complain about**

- 🐛 Occasional crashes and sync issues
- 🔒 Limited cloud storage integration options
- 👎 Lack of advanced organization and navigation features
- 👎 Subpar text selection and cursor control
- 👎 Dated app icon and visual design

**Reported bugs**

- Crashes when opening certain files
- Sync issues leading to data loss
- Formatting problems when exporting to other formats

**Requested features**

- Improved cloud storage integration (Dropbox, Google Drive, etc.)
- Enhanced file management and organization tools
- Better text selection and cursor control
- More customization options for appearance and layout
- Integrated outline/table of contents view


### RayCrest Lab Calculator

[App page](https://appshunter.io/ios/app/raycrest-lab-calculator/id6785651551)

This app assists researchers, students, and lab teams with essential calculations for preparing buffers, solutions, and dilutions. It provides practical guidance for weighing solids, mixing stocks, and titration, with built-in tools for buffer charts, recipes, and protocol timers.

**Highlights:** Buffer preparation guidance, Henderson-Hasselbalch recipes, Stock mixing and titration, Solution and dilution calculations, Mass/volume conversions, Protocol timers, Saved recipes and compounds

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

**In-app purchases:** none


## Frequently asked questions

### Is iA Writer free?

iA Writer costs $19.99, with no in-app purchases.

### Is RayCrest Lab Calculator free?

RayCrest Lab Calculator is free to download, with no in-app purchases.

### Which has better reviews, iA Writer or RayCrest Lab Calculator?

RayCrest Lab Calculator is rated higher. iA Writer averages 4.6 out of 5 from 1.5K ratings, while RayCrest Lab Calculator averages 4.7 from 3 ratings.

### Do iA Writer or RayCrest Lab Calculator have ads?

Neither iA Writer nor RayCrest Lab Calculator shows ads.

### Which is updated more often, iA Writer or RayCrest Lab Calculator?

iA Writer ships an update every 2 weeks, and RayCrest Lab Calculator every 2 months. Most recently, iA Writer was updated on October 29, 2026 and RayCrest Lab Calculator 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.*