# SolarWriter vs RingCalendar

The clearest difference is update cadence: RingCalendar at every 3 days against SolarWriter's every 5 months. SolarWriter's advantage is iOS requirement (15.6 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SolarWriter sells 2 one-off in-app purchases and RingCalendar sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

SolarWriter ships an update every 5 months, RingCalendar every 3 days. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | SolarWriter | RingCalendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (16 ratings)](https://appshunter.io/ios/app/solarwriter-e-ink-typewriter/id997410577/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 22 MB |
| Requires iOS | **15.6** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Cool S, LLC](https://appshunter.io/developer/997410576) | [IO CZ s.r.o.](https://appshunter.io/developer/6810563572) |

## What reviewers say

### SolarWriter

[App page](https://appshunter.io/ios/app/solarwriter-e-ink-typewriter/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 (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SolarWriter Pro | $9.99 | one-time |
| SolarWriter Pro | $19.99 | one-time |


### RingCalendar

[App page](https://appshunter.io/ios/app/ringcalendar/id6810563570)

**Features:** Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-Day Trial | Free | one-time |
| RingCalendar Pro | $12.99 | one-time |


## Frequently asked questions

### Is SolarWriter free?

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

### Is RingCalendar free?

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

### Do SolarWriter or RingCalendar have ads?

Neither SolarWriter nor RingCalendar shows ads.

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

SolarWriter ships an update every 5 months, and RingCalendar every 3 days. Most recently, SolarWriter was updated on November 13, 2026 and RingCalendar on November 10, 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.*