Comparison

SolarWriter vs Inbox Imp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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 on the iOS device and on 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 paper 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.

About

Inbox Imp

Features
Read full description

Inbox Imp is an AI email organizer for Gmail and Outlook. It reads your mail so you don't have to: anything that needs a reply stays in your inbox, and everything else is filed where you can still search it. Nothing is deleted behind your back. An AI assistant sorts every incoming email: advertising gets filed, cold pitches go to their own pile, and the handful of messages that actually need you stay in a short, quiet queue. The app shows you that queue: who wrote, what it's about, and why it's worth your time. Clear each message with one swipe. Every inbox you own, one membership. Connect Gmail, Google Workspace, Outlook.com, Hotmail and Microsoft 365 addresses under one account. - Rules you can read: a plain-English page says how your mail is handled, and you can edit it - Safeguards above the AI: login codes, real replies, receipts and money mail, calendar invites and account notices stay in your inbox - Archive, never delete: filed mail stays searchable; only clear junk goes to Trash, recoverable for 30 days - Every action is logged with a reason, one tap to undo, and a Recently archived list to review - "Why you got this" on every message it keeps - Reply, forward and compose with dictation, attachments and AI drafting help - Catch up on a long thread in one line per message - Push roundups instead of a ping for every email; urgent mail still comes through - Ask your mail anything: search that answers questions, not just keywords - Spending: what you paid, by merchant, from your receipts Independently security reviewed: Inbox Imp passed Google's OAuth verification with a CASA Tier 2 assessment, renewed yearly. Try Inbox Imp free for 7 days; no payment details needed to start. After the trial, an Inbox Imp membership is $9.99 per month (auto-renewing, cancel anytime in Settings) and covers all of your inboxes. Privacy policy: https://inboximp.com/privacy Terms of use: https://inboximp.com/terms

Screenshots

SolarWriter3 screens
Inbox Imp4 screens

Verdict

The call

The clearest difference is update cadence: Inbox Imp at every 4 days against SolarWriter's every 5 months. SolarWriter's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

SolarWriter ships an update every 5 months, Inbox Imp every 4 days. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 7 level
SolarWriter versus Inbox Imp: the parameters behind the verdict, then further details
ParameterSolarWriterInbox Imp
PriceFreeFree
Rating3.8 (16 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 5 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size92 MB10 MB
Age rating4+4+
DeveloperCool S, LLCBitwise Learning Inc

In-app purchases

1 purchases

SolarWriter

One-time1
  • SolarWriter Pro$9.99
1 purchases

Inbox Imp

Subscriptions1
  • Inbox Imp Monthly$9.991 Month

Questions

Is SolarWriter free?
SolarWriter is free to download, with in-app purchases available.
Is Inbox Imp free?
Inbox Imp is free to download, with in-app purchases available.
Do SolarWriter or Inbox Imp have ads?
Neither SolarWriter nor Inbox Imp shows ads.
Which is updated more often, SolarWriter or Inbox Imp?
SolarWriter ships an update every 5 months, and Inbox Imp every 4 days. Most recently, SolarWriter was updated on October 10, 2026 and Inbox Imp on October 14, 2026.

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