SolarWriter vs ACRE Mobile
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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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.
ACRE Mobile
This tool allows users to manage and update lease records offline, syncing data when connected. It supports tracking lease inspections, communications, and other COR file documentation. Additionally, it records building non-compliance findings for program oversight and best practices.
- Offline record access and updates
- Lease inspection tracking
- COR file documentation management
- Building non-compliance reporting
- Ad hoc inspection checklists
- File management and reports
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The Lease Management Tool/Minor Analysis Review System (LMT/MARS) serves the PBS Office of Facilities Management (OFM) and is available within the ACRE hub's web and mobile applications. The mobile app allows users to access and update records offline using various devices ex: Mobile, iPad, desktop to view synced data when the device is connected. See descriptions below on the functionality found in LMT and MARS: LMT is the official system of record for Lease CORs. Lease CORs use LMT to record, track, and report on programmatic issues that affect building operations in leased properties such as: the Lease Inspection Form, GSA 500; other inspections including ad-hoc and child care inspections; communications; submittals; and all other COR file documentation required to maintain the COR file. MARS records and tracks physical building non-compliance findings to improve overall program oversight, share best practices, and capture lessons learned. The MARS functionality provides Ad hoc Inspection and Checklists, file management, reports, and review of records.
Screenshots
Verdict
The clearest difference is rating: SolarWriter at 3.8 against ACRE Mobile's 1.0. SolarWriter also leads on ratings volume (16 vs 2). ACRE Mobile's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 5 months). On price, ads 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 1 one-off in-app purchase. ACRE Mobile asks for nothing beyond the download.
SolarWriter holds the better App Store score, 3.8 against 1.0. That said, the two scores are not equally well evidenced: SolarWriter has 16 ratings behind it against 2, so its average is the more settled of the two.
SolarWriter ships an update every 5 months, ACRE Mobile every 2 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | SolarWriter | ACRE Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (16 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 16 — better | 2 |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 92 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Cool S, LLC | U.S. General Services Administration |
Customer experience
SolarWriter
ACRE Mobile
In-app purchases
SolarWriter
- SolarWriter Pro$9.99
ACRE Mobile
No in-app purchases









