Comparison

Paperlock vs Calc Plus

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

Head to head
About

Paperlock

Read full description

Paperlock is a locked drawer for the papers that matter. Your iPhone can already scan a page. Paperlock is where the scan goes afterwards, when it is something you would not leave lying around: a passport, a lease, a tax return, a medical record. LOCKED AND ENCRYPTED • Locks as soon as you leave it. Face ID, Touch ID or your passcode opens it again. • Every scan, PDF, name and note is encrypted with AES-256 before it is stored. • The key stays in your iPhone's Keychain, on this device only. YOUR PAPERS • Scan paper with the camera. Several pages become one PDF. • Import PDFs you already have. • Give each document a name and a note, and search through both. • Open a PDF, or share a copy when you choose. BACK UP ON YOUR TERMS • A backup is one encrypted file with its own password. • You decide where it goes. Paperlock does not upload it. • A vault password opens your documents on a new iPhone. PRIVATE BY DESIGN • No account, no cloud, no server, no analytics, no ads. • The app makes no network requests at all. GOOD TO KNOW • There is no password reset. Nobody else holds your key, so nobody can recover it for you. • There is no sync. Your documents are on one phone, and a backup file is how you move them. Paperlock was called Secure Document Vault. If you have it, this update keeps your documents and encrypts them the first time you open it.

About

Calc Plus

This app offers a modern and organized way to perform everyday calculations, conversions, and manage multiple tasks. It provides instant results as you type and allows for personalization with themes and icons.

Highlights
  • Instant results as you type
  • Currency and unit converter
  • Multiple calculation tabs
  • Calculation history
  • Customizable themes and icons
Features
Read full description

Calc Plus is a modern calculator designed to make everyday calculations faster, simpler, and more organized. Whether you’re working through a quick calculation, converting currencies, checking measurements, or keeping track of multiple calculations at once, Calc Plus gives you the tools you need in one clean and easy-to-use app. CALCULATE WITH EASE Get instant results as you type, so you can see your answer without needing to press equals every time. Calc Plus is designed to make everyday calculations feel quick and effortless. CURRENCY & UNIT CONVERTER Convert currencies and everyday units directly from the app. Quickly switch between values and get the information you need without jumping between different tools. MULTIPLE CALCULATION TABS Keep different calculations separate and organized with multiple tabs. Start a new calculation without losing what you were working on and easily switch between them whenever you need. CALCULATION HISTORY Never lose track of a calculation. Your history makes it easy to revisit previous calculations whenever you need them. MAKE IT YOURS Personalize Calc Plus to match your style. Choose from different themes, button styles, and app icons to create a calculator that feels uniquely yours. WHY CALC PLUS? • Calculator, currency converter, and unit converter in one app • Instant results as you type • Multiple tabs for better organization • Calculation history for easy reference • Custom themes and button styles • Alternative app icons • Clean, modern, and intuitive design From quick everyday calculations to conversions and more complex workflows, Calc Plus keeps everything simple, organized, and within reach. Calculate. Convert. Stay organized.

Screenshots

Paperlock4 screens
Calc Plus4 screens

Verdict

The call

The clearest difference is update cadence: Calc Plus at every 6 days against Paperlock's every 13 months. Calc Plus also leads on iOS requirement (16.4 vs 18.5). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Paperlock ships an update every 13 months, Calc Plus every 6 days. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 8 level
Paperlock versus Calc Plus: the parameters behind the verdict, then further details
ParameterPaperlockCalc Plus
PriceFreeFree
Rating—4.5 (4 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 13 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS18.516.4 — better
Further details — not scored
Size1 MB69 MB
Age rating4+4+
DeveloperJohn LarsonNeue Software

In-app purchases

None

Paperlock

No in-app purchases

None

Calc Plus

No in-app purchases

Questions

Is Paperlock free?
Paperlock is free to download, with no in-app purchases.
Is Calc Plus free?
Calc Plus is free to download, with no in-app purchases.
Do Paperlock or Calc Plus have ads?
Neither Paperlock nor Calc Plus shows ads.
Which is updated more often, Paperlock or Calc Plus?
Paperlock ships an update every 13 months, and Calc Plus every 6 days. Most recently, Paperlock was updated on October 24, 2026 and Calc Plus on October 26, 2026.

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