Digital Ruler vs HarborKeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Digital Ruler
Measure small objects directly on your device's screen. Adjust the on-screen area to match the item's dimensions and get precise width, height, and diagonal measurements in centimeters or inches.
- Measure width, height, and diagonal
- Supports centimeters and inches
- Adjustable on-screen measurement area
- Works on iPhone and iPad
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With Digital Ruler you can measure all the the small things which fit on the screen of your iDevice. Just adjust the size of the white area to the size of the item you want to measure. Digital Ruler will show you the width, the height and the diagonal of the item in centimeters or inches. Warning: Do NOT put heavy, sharp or other dangerous things on your iPad screen! This will damage your iPad. We will not be responsible for any damage!
HarborKeep
Organize critical family information, including medical records, legal documents, and emergency contacts, in a secure private vault. Easily store notes, photos, and files, and access them quickly when needed. Information is protected on your device and can sync across Apple devices via iCloud.
- Private life vault
- Family records organization
- Emergency information storage
- Medical notes and insurance details
- Secure notes and login details
- Attach documents and images
- Sync across Apple devices via iCloud
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When something goes wrong, the right information should be easy to hand over. HarborKeep keeps your family's important records private on your iPhone and iPad, and turns the essentials into a one-page sheet someone else can use. PRINT AN EMERGENCY SHEET One page for the fridge or a sitter: the emergency number, your address and helpful household information, who to call, the people who live with you and their allergies and conditions, medications, doctors, and the home plan. Fields you mark private are left out, and the page explains when details could not be included. YOU CHOOSE WHAT GOES ON IT Start with the Emergency Sheet Guide, or pick each detail yourself. Add contacts from Apple Contacts without giving HarborKeep access to your whole address book, reuse contacts you've already saved, or type them in. Your address and each household member are separate choices, and each medication can say who takes it. Preview the page, then print, AirDrop, message, or save it to Files. ONE PLACE FOR WHAT MATTERS Keep insurance, identification, medical contacts, medications, legal papers, pets, and household records organized with categories, favorites, and related records. Pin what matters to the Emergency tab. Set optional reminders before policies and IDs expire, with notification text that keeps details private. PHOTOS AND DOCUMENTS THAT WORK FOR YOU Scan documents, extract text, and search what's inside them. Review photo tags and suggested dates, and decide what to apply. Analysis runs on your device. YOUR DATA, YOUR COPIES Create encrypted backups for free, and keep an offline recovery kit with them. The kit can open supported backups on a computer without HarborKeep, within documented size and format limits. Save a Readable Copy as PDFs and files you can open anywhere, with the option to leave out designated private fields. Review your copy before sharing. Recover deleted records from Recently Deleted for up to 30 days. PRIVATE BY DESIGN Your records are encrypted before they're stored and protected by Face ID, Touch ID, or your passcode. Sync across your devices using the same Apple Account with iCloud and iCloud Keychain turned on. HarborKeep has no separate account, no ads, and no third-party tracking. ALSO INCLUDED Formatted notes and drawings with Plain, Lined, Grid, or Dots paper, share-sheet capture with Shared Inbox, encrypted drafts that survive interruptions, a password and passphrase generator, and AutoFill for saved logins. FREE, WITH AN OPTIONAL ONE-TIME UPGRADE Records, search, the emergency sheet, the Household Profile, encrypted backups, readable copies, and up to 12 attachments per record are free. HarborKeep Pro is a one-time purchase that adds unlimited custom category photos and up to 25 attachments per record. No subscription.
Screenshots
Verdict
The clearest difference is rating: HarborKeep at 5.0 against Digital Ruler's 1.0. HarborKeep also leads on update cadence (every 9 days vs every 128 months). Digital Ruler's advantage is in-app purchases (none vs 1) and ratings volume (3 vs 1). 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. HarborKeep sells 1 one-off in-app purchase. Digital Ruler asks for nothing beyond the download.
HarborKeep holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Digital Ruler ships an update every 128 months, HarborKeep every 9 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | Digital Ruler | HarborKeep |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 128 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Nguyen Nam Giang | C. Ray Carroll LLC |
Customer experience
Digital Ruler
HarborKeep
In-app purchases
Digital Ruler
No in-app purchases
HarborKeep
- Secure Import & Export$3.99









