Comparison

Digital Ruler vs HarborKeep

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

Head to head
About

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.

Highlights
  • Measure width, height, and diagonal
  • Supports centimeters and inches
  • Adjustable on-screen measurement area
  • Works on iPhone and iPad
Features
Read full description

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!

About

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.

Highlights
  • 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
Features
Read full description

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

Digital Ruler2 screens
HarborKeep4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HarborKeep sells 1 one-off in-app purchase. Digital Ruler asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Digital Ruler versus HarborKeep: the parameters behind the verdict, then further details
ParameterDigital RulerHarborKeep
PriceFreeFree
Rating1.0 (3 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings3 — better1
Update frequencyEvery 128 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better18.6
Further details — not scored
Size2 MB28 MB
Age rating4+4+
DeveloperNguyen Nam GiangC. Ray Carroll LLC

Customer experience

Digital Ruler

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

HarborKeep

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Digital Ruler

No in-app purchases

1 purchases

HarborKeep

One-time1
  • Secure Import & Export$3.99

Questions

Is Digital Ruler free?
Digital Ruler is free to download, with no in-app purchases.
Is HarborKeep free?
HarborKeep is free to download, with in-app purchases available.
Which has better reviews, Digital Ruler or HarborKeep?
HarborKeep is rated higher. Digital Ruler averages 1.0 out of 5 from 3 ratings, while HarborKeep averages 5.0 from 1 ratings.
Do Digital Ruler or HarborKeep have ads?
Neither Digital Ruler nor HarborKeep shows ads.
Which is updated more often, Digital Ruler or HarborKeep?
Digital Ruler ships an update every 128 months, and HarborKeep every 9 days. Most recently, Digital Ruler was updated on November 3, 2026 and HarborKeep on October 30, 2026.

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