Comparison

CloudLabs Sinusoidal Current vs Lectra Notes

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

Head to head
About

CloudLabs Sinusoidal Current

Features
Read full description

In this practice, you will apply your knowledge of frequency, amplitude, phase difference and period of a sine wave. This signal is the electrical current required to charge the battery of a cell phone. The lab provides a pedal mechanism that will allow you to produce mechanical energy, a transformer to transform mechanical energy into electrical energy, a cell phone and two measurement instruments, a voltmeter and an oscilloscope.

About

Lectra Notes

This app provides a private workspace for reading, annotating, and organizing PDF documents. It helps users understand dense texts faster with on-device intelligence for summaries and suggested tags. Designed for a calmer document workflow, it ensures your files remain private.

Highlights
  • Read and mark up PDFs
  • Highlight key passages and add notes
  • Organize documents with folders and tags
  • Generate summaries and suggested tags
  • Private by design with on-device intelligence
  • Backup and sync library
Features
Read full description

Lectra is a workspace for the documents you think on: lecture slides, problem sets, papers, and textbooks, marked up by hand and kept in one library that works without a signal. READ AND MARK UP Open any PDF and work it over with Apple Pencil. A pressure-responsive pen, highlighter, and eraser in a calm, distraction-free editor keep your ink sharp at any zoom. Select the document's own text with a finger. On Apple Pencil Pro, squeeze to switch tools. MADE FOR IPHONE DUO Folded, Lectra fits the outer screen. Open it, and your page spreads across the full display, with every control kept clear of the camera and status bar. On iPad, keep two documents side by side. RECORD THE LECTURE BESIDE YOUR NOTES Start recording from a control that floats above the whole app, then keep writing. Tap a handwritten stroke to hear what was being said as the pen moved. Drag the playhead and watch the page fill back in, stroke by stroke. Transcription runs on your iPad, and an hour of lecture takes about 15 MB. NOTEBOOKS AND PAPER Start from a blank page when the thinking hasn't found a document yet. Choose blank, lined, grid, dotted, or Cornell paper for each new page, then export your pages as PDFs. SCAN ANYTHING Bring paper into the record. Scan pages with the camera and mark them up like any other PDF. ASK YOUR DOCUMENTS Ask a question about what you're reading and get an answer that cites the page it came from. Summarize a document to get to the point faster. These features run on your iPad, are off until you turn them on, and never use your notes or documents to train a model. WHEN READING TURNS INTO WORK Run Python where you already work: notebooks with charts, a real shell, Git, and a code editor, all on your iPad and all offline. The document and the work on it stay in the same place. YOUR MAC, TOO Lectra for Mac is a free download at canvascope.org/mac. It brings the whole app to your desktop, puts your Mac on your iPad as a remote desktop, sends documents straight between iPad and Mac, and shares one clipboard. The Remote Desktop assistant can open a website, search, or launch an app on your Mac in one step, and asks before it acts unless you turn on Auto-run. A LIBRARY THAT KEEPS UP Everything in one place, available offline, and backed up when you sign in. Your documents are yours: export them anytime, in formats that open anywhere. PRIVATE BY DESIGN No ads and no tracking. Lectra is free to use.

Screenshots

CloudLabs Sinusoidal Current1 screens
Lectra Notes4 screens

Verdict

The call

The clearest difference is iOS requirement: CloudLabs Sinusoidal Current at 9.0 against Lectra Notes's 18.0. On price, update cadence, ads and in-app purchases 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

CloudLabs Sinusoidal Current ships an update every 6 days, Lectra Notes weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 8 level
CloudLabs Sinusoidal Current versus Lectra Notes: the parameters behind the verdict, then further details
ParameterCloudLabs Sinusoidal CurrentLectra Notes
PriceFreeFree
Rating—5.0 (9 ratings) — better
Number of ratings—9 — better
Update frequencyEvery 6 days — betterWeekly
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better18.0
Further details — not scored
Size85 MB51 MB
Age rating4+4+
DeveloperJiovany OrozcoNoel Sason

In-app purchases

None

CloudLabs Sinusoidal Current

No in-app purchases

None

Lectra Notes

No in-app purchases

Questions

Is CloudLabs Sinusoidal Current free?
CloudLabs Sinusoidal Current is free to download, with no in-app purchases.
Is Lectra Notes free?
Lectra Notes is free to download, with no in-app purchases.
Do CloudLabs Sinusoidal Current or Lectra Notes have ads?
Neither CloudLabs Sinusoidal Current nor Lectra Notes shows ads.
Which is updated more often, CloudLabs Sinusoidal Current or Lectra Notes?
CloudLabs Sinusoidal Current ships an update every 6 days, and Lectra Notes weekly. Most recently, CloudLabs Sinusoidal Current was updated on November 3, 2026 and Lectra Notes on November 5, 2026.

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