Comparison

iSafe Folder vs Stringline

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

Head to head
About

iSafe Folder

Securely store and organize your private files, including photos, videos, and documents. Customize your lock screen with gestures and import files from various cloud services and devices. Manage your data with renaming, archiving, and sorting options.

Highlights
  • Customizable gesture lock screen
  • Import from cloud services
  • Organize and manage files
  • Support for various file types
  • Dark and Light mode options
  • Drag and Drop support on iPad
Read full description

Add a new layer of privacy to your Data. Lock, organise and read your files, audio, video (mp4, avi, MOV), photos, documents (Office, Pages, Numbers, Keynotes, pdf,...) Support Drag and Drop (multitasking) on iPad - Customizable gesture lock screen • customize the size your gesture grid • customize the length of your passcode up to 25 points on iPad, 16 on iPhone - Import from : • iOS App, • itunes sharing, • iCloud, • AirDrop, • Dropbox, • Mega, ... - Rename, archive (zip), share your files, move them to different folders - Sort your files/folders by name or type - Choose between Dark-mode or Light-mode display TRY FOR FREE term of use: http://i-arun-softwares.com/TermsOfService.html

About

Stringline

Features
Read full description

Construction calculator that works in feet, inches, and fractions — matched to 1/64". Download for free. No subscription. No ads. Works offline. 14 SPECIALTY CALCULATORS Stair Layout — rise, run, stringer, angle. IRC and OSHA code check built in. Concrete — cubic yards and bag counts for slabs, footings, columns. Rafter Length — common, hip/valley, jack. Plumb cut, seat cut, overhang. Equal Spacing — every position for studs, balusters, posts, joists. Compound Miter — blade tilt and miter angle for crown and trim. Studs / OC — count and positions for any wall at 16" or 24". Pitch / Slope — pitch, degrees, grade, and roof factor. Baluster Spacing — count, gap, and positions. IRC 4" sphere test built in. Board Feet — lumber volume from nominal dimensions. Drywall Estimator — sheets, waste factor, and opening deductions. Roofing Calculator — squares, bundles, and sheathing for any roof pitch. Right Triangle — check square on any corner. Two sides in, all angles out. Area & Volume — rectangles, circles, triangles, trapezoids. Conversions — feet-inches, decimal feet, metric. HOW IT WORKS Three calculators are yours to keep — Right Triangle, Area & Volume, and Conversions — with the full keypad, memory, and paper tape. No limits, no catch. The other 11 Pro calculators (stairs, concrete, rafters, and more) come with 5 uses so you can try them on a real job. One purchase unlocks everything permanently. YOUR TAPE READS FRACTIONS. SO DOES STRINGLINE. Enter 12' 3-1/2" exactly how you say it. No converting to decimals, no rounding surprises. Integer 64ths arithmetic — every answer matches your tape, not a floating-point guess. BUILT TO BE TRUSTED • Shows the math — step-by-step so you can verify every answer • IRC and OSHA validation with code section citations • Every formula verified against building code standards before release • Paper tape and full calculation history • PDF export with Show My Work steps • Works completely offline — no internet, no accounts No subscription. No ads. Built for tradespeople who can't afford a wrong number.

Screenshots

iSafe Folder4 screens
Stringline4 screens

Verdict

The call

The clearest difference is update cadence: Stringline at every 2 weeks against iSafe Folder's every 6 months. iSafe Folder's advantage is iOS requirement (11.0 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. iSafe Folder sells 1 one-off in-app purchase and Stringline sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

iSafe Folder ships an update every 6 months, Stringline every 2 weeks. The most recent releases landed on September 17, 2026 and June 27, 2026 respectively.

Scorecard2 real differences · 8 level
iSafe Folder versus Stringline: the parameters behind the verdict, then further details
ParameteriSafe FolderStringline
PriceFreeFree
Rating2.0 (2 ratings) — better
Positive reviews0.0% of reviews
Number of ratings2 — better
Update frequencyEvery 6 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better15.1
Further details — not scored
Size27 MB21 MB
Age rating4+4+
DeveloperLaurent BottigliengoHector Sahagun

In-app purchases

1 purchases

iSafe Folder

One-time1
  • Unlimited Usage$3.99
1 purchases

Stringline

One-time1
  • Stringline Pro$2.99

Questions

Is iSafe Folder free?
iSafe Folder is free to download, with in-app purchases available.
Is Stringline free?
Stringline is free to download, with in-app purchases available.
Do iSafe Folder or Stringline have ads?
Neither iSafe Folder nor Stringline shows ads.
Which is updated more often, iSafe Folder or Stringline?
iSafe Folder ships an update every 6 months, and Stringline every 2 weeks. Most recently, iSafe Folder was updated on September 17, 2026 and Stringline on June 27, 2026.

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