SolarWriter vs RingCalendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SolarWriter
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.
- E-reader integration
- External keyboard support
- Outdoor writing on e-ink screens
- Text mirroring to e-reader
- File saving and sharing
- Detailed setup instructions
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Turn your Kindle or e-reader into a sunlight-readable, distraction-free typewriter! Traditional screens are fantastic everywhere but outside, especially on a sunny day. E-ink screens work well, but e-readers like the Kindle are difficult to type on and don't support external keyboards. SolarWriter gives you the best of both worlds. SolarWriter runs on your iOS device and acts as a hub between your keyboard and your e-reader. You type on the keyboard, and the text appears on both the iOS device and the e-reader's screen (via its web browser). Take advantage of your Kindle's (or other e-reader's) e-ink screen to put your thoughts on the page even outside, with no need to transcribe later. Write at parks, on beaches, in backyards... anywhere you wanted to, but couldn't. Save files on your device, or share through email, SMS, and more. Detailed instructions for setup are included inside the app. What You Need: Your iPhone or iPad running SolarWriter An external keyboard A Kindle or other e-reader with a built-in web browser
RingCalendar
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When there’s enough room, event names appear directly on the ring so you can understand your day even faster. EVENTS + REMINDERS. TOGETHER. Your calendar events and reminders live in one clear daily view. See what’s happening, what’s next and what still needs to be done without switching between separate apps. EVENT NOTES A calendar tells you when something happened. Event Notes help you remember what happened. Attach: • Text Notes • Voice Notes • Photo Notes to the events that gave them context. EVENT NOTES LIBRARY All your Event Notes now have their own home. Browse notes from across your calendar, search them, filter by type or event date, select multiple notes at once and jump directly back to the original event. MONTH VIEW Zoom out without losing the details. RingCalendar’s Month View gives you a visual overview of busy and quiet days while keeping individual events visible. DAILY REVIEW Revisit the moments you captured during the day in chronological context. RingCalendar keeps your notes tied to the calendar instead of turning them into an isolated archive. APPLE WATCH Keep your day close at hand. View events and reminders, capture Event Notes and use RingCalendar directly from Apple Watch. Day Progress gives you a compact visual sense of what’s coming next. BUILT FOR DIFFERENT WAYS OF WORKING RingCalendar adapts its layout to the available screen, including spacious multi-pane views on larger and Duo displays. Your calendar remembers when. RingCalendar helps you remember.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SolarWriter | RingCalendar |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (16 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Every 5 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.6 — better | 26.5 |
| Further details — not scored | ||
| Size | 97 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Cool S, LLC | IO CZ s.r.o. |
In-app purchases
SolarWriter
- SolarWriter Pro$9.99
- SolarWriter Pro$19.99
RingCalendar
- 7-Day TrialFree
- RingCalendar Pro$12.99









