# SolarWriter vs QuantFit

The clearest difference is review sentiment: SolarWriter at 60% against QuantFit's 0%. SolarWriter also leads on rating (3.8 vs 3.0) and ratings volume (16 vs 1). QuantFit's advantage is update cadence (every 2 weeks vs every 5 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SolarWriter sells 1 one-off in-app purchase and QuantFit sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

SolarWriter holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: SolarWriter has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 60% of SolarWriter's written reviews are positive against 0% of QuantFit's.

SolarWriter ships an update every 5 months, QuantFit every 2 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SolarWriter | QuantFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (16 ratings)](https://appshunter.io/ios/app/solarwriter/id997410577/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/quantfit/id6762386971/reviews) |
| Number of ratings | **16** | 1 |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 92 MB | 54 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cool S, LLC](https://appshunter.io/developer/997410576) | [Andrew Esparon](https://appshunter.io/developer/1849179000) |

## What reviewers say

### SolarWriter

[App page](https://appshunter.io/ios/app/solarwriter/id997410577)

Transform your e-reader into a portable typewriter for outdoor writing. This app connects your keyboard to your e-reader's screen, allowing you to type comfortably on e-ink displays in bright sunlight. Save and share your work easily.

**Highlights:** E-reader integration, External keyboard support, Outdoor writing on e-ink screens, Text mirroring to e-reader, File saving and sharing, Detailed setup instructions

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SolarWriter Pro | $9.99 | one-time |


### QuantFit

[App page](https://appshunter.io/ios/app/quantfit/id6762386971)

This app provides a powerful econometrics workbench for mobile devices, allowing users to run complex regressions and analyze data on the go. It supports various estimation techniques and integrates with live data sources, offering publication-ready output and advanced diagnostic tools.

**Highlights:** Cross-section and panel estimators, Time-series and system estimators, Live data integration (World Bank, IMF, FRED), Publication-ready output (LaTeX, PNG, CSV), Residual diagnostics and unit-root tests, Policy and scenario shock simulations, Auto-generated academic paper drafts

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QuantFit Pro Monthly | $9.99 | per month |
| QuantFit Pro Annual | $59.99 | per year |
| QuantFit Pro Lifetime | $149.99 | one-time |


## Frequently asked questions

### Is SolarWriter free?

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

### Is QuantFit free?

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

### Which has better reviews, SolarWriter or QuantFit?

SolarWriter is rated higher. SolarWriter averages 3.8 out of 5 from 16 ratings, while QuantFit averages 3.0 from 1 ratings.

### Do SolarWriter or QuantFit have ads?

Neither SolarWriter nor QuantFit shows ads.

### Which is updated more often, SolarWriter or QuantFit?

SolarWriter ships an update every 5 months, and QuantFit every 2 weeks. Most recently, SolarWriter was updated on November 1, 2026 and QuantFit on November 5, 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.*