Comparison

SignPrep vs Sigma Notepad Calculator

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

Head to head
About

SignPrep

Features
Read full description

SignPrep supports sign language interpreters before, during, and after each assignment. It helps you prepare, time your swaps, write reflections, track CPD, and look after your wellbeing. ASSIGNMENTS Import assignments from work calendars or add them manually. See countdowns, locations, directions, preparation progress, notes, and AI briefings in one place. PREPARATION Prepare with editable checklists, research tools, key terms, glossary suggestions, notes, resources, and web searches you check before they open. AI BRIEFINGS Get a two-sentence briefing for any upcoming or ongoing assignment, covering its subject matter and the terminology to expect. ONGOING ASSIGNMENT Live Session shows progress, the active interpreter, next swap, and time remaining. Ambient Mode gives a full-screen view for coordinating swaps. SWAP TIMER & SWAP CLOCK Use Swap Timer for set intervals or Swap Clock for flexible turn-taking. Swap Timer's pause, resume, swap, and stop work the same way from the app, Apple Watch, the Lock Screen, and Siri; Swap Clock runs from the app and Siri. APPLE WATCH View assignments and control swap timing on your wrist. Complications and Smart Stack cards show what is next or ongoing, CPD hours, and signs due for review. WIDGETS, LIVE ACTIVITIES & CONTROLS Widgets show upcoming assignments, CPD progress, a Featured Sign, and how many signs are due for review. Live Activities keep timing on the Lock Screen, and Control Centre buttons start a session or open the swap timer. SIRI & SHORTCUTS Ask Siri to find or show a sign, check your assignments, run the swap timer or swap clock, or log a reflection. You don't have to say phrases word for word, and you can use SignPrep actions in your own shortcuts. On iOS 27, Siri AI (Beta) can also search your glossary, add or move an assignment, and act on what you have open. Siri AI needs a compatible device, is not available in every language or region, and may have a waitlist. OPTIONAL AI Apple Intelligence generates briefings, research, glossary suggestions, and checklists. AI output supports, rather than replaces, your professional judgement. SIGN GLOSSARY Build a video library of signs in SgSL, ASL, BSL, Auslan, NZSL, and more. Record clips, tag entries, add other names for a sign, review in slow motion, and export or import your glossary. DC-S REFLECTIONS Use Demand Control Schema prompts for environmental, interpersonal, paralinguistic, and intrapersonal demands. Track streaks, flag entries for mentor discussion, and export as PDF or CSV. CPD TRACKING Log professional development hours by activity type, with suggested hours for RID and NRCPD. Set a target and renewal period, carry over extra hours if your scheme allows, and track progress in the app and on Apple Watch. SELF-CARE Log mood, fatigue, and cognitive load. View trends, follow guided breathing and interpreter-specific stretches, and get suggestions for recovery. PRIVACY & SECURITY Protect your data with App Lock, Face ID or Touch ID, protected app-switcher previews, an access log, and optional iCloud backup exclusion. App Lock also protects Siri, Shortcuts, device search, and the assignment and glossary widgets. Exports from Settings show what they keep and remove before you share them. SignPrep has no account and keeps no copy of your data, which is stored on your devices. Some features can send what they need to a service, such as Apple's Private Cloud Compute for briefings and research on iOS 27, or Google for a web search you check. Privacy Preview in Settings shows what each feature can send. RESOURCES Explore an interactive Code of Professional Conduct, role cards for hearing clients, and links to interpreter and Deaf community organisations. ACCESSIBLE BY DESIGN Built with VoiceOver, Dynamic Type, high-contrast colours, Reduce Motion, large touch targets, and haptics. Designed for iOS 26 and iOS 27 with Liquid Glass.

About

Sigma Notepad Calculator

Features
Read full description

Write your bills, a trip or a dinner to split as a note. Every line shows its result as you type. Your monthly bills, the way you think about them: "rent: 1200", "food: 380", "transport: 95", then "rent + food + transport" shows 1675. Change the rent and every line that uses it updates. No equals sign, no formulas, no grid. Splitting dinner? Write "dinner: 240", "tip: 15% of dinner", then "(dinner + tip) / 4" for each share. Planning a trip? "hotel: $85 times 3", "flights: $420", then "hotel + flights". Free with three sheets and the full calculator. No ads, no time limit. Sigma Pro unlocks unlimited sheets, export, iCloud sync, and five more themes, billed yearly, monthly, or once for life. New subscribers get a 7-day free trial on the yearly plan. Highlights: - Money notes. Bills, trips, shared costs and quick estimates, written as plain lines with a result beside each one. - Named values. Name a number once and use it on any line below. Change it and every line that uses it updates. - Natural language arithmetic. Operators read like English: times, plus, of. Percentages, averages, units, and dates work the way you write them. - Currency. Live rates with offline cache. When rates are out of date, a dot appears on the line; tap it to see when they were fetched. - Themes. Six themes including a high-contrast option. The default follows your system light and dark; five more unlock with Sigma Pro. - Sheets. Up to three sheets on the free tier. Sigma Pro unlocks unlimited sheets, export to PDF, Markdown, and plain text, plus iCloud sync across your devices. - Private by default. Sheets stay on your device. iCloud sync uses your private database, never our servers. - Designed for iOS first. Reads French and English natively. No web app, no ads, no surprise pop-ups. - For the technical side: hex, square roots, and trigonometry are there too. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getsigma.app/privacy

Screenshots

SignPrep4 screens
Sigma Notepad Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: SignPrep at none against Sigma Notepad Calculator's 3. SignPrep also leads on update cadence (every 3 days vs every 4 weeks) and device support (3 vs 1). Sigma Notepad Calculator's advantage is iOS requirement (17.0 vs 26.0). On price and ads there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sigma Notepad Calculator sells 3 in-app purchases, starting at $1.99 per month. SignPrep asks for nothing beyond the download.

UpkeepUpdate frequency

SignPrep ships an update every 3 days, Sigma Notepad Calculator every 4 weeks. The most recent releases landed on October 19, 2026 and October 8, 2026 respectively.

Scorecard4 real differences Β· 2 level
SignPrep versus Sigma Notepad Calculator: the parameters behind the verdict, then further details
ParameterSignPrepSigma Notepad Calculator
PriceFreeFree
Update frequencyEvery 3 days β€” betterEvery 4 weeks
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, Apple Watch β€” betteriPhone
Requires iOS26.017.0 β€” better
Further details β€” not scored
Size42 MB15 MB
Age rating4+4+
DeveloperDaniel YongΒ (Singapore)Soules Studio Ltd

In-app purchases

None

SignPrep

No in-app purchases

3 purchases

Sigma Notepad Calculator

Subscriptions2
  • Monthly$1.991 Month
  • Annual7 Days trial$14.991 Year
One-time1
  • Lifetime$29.99

Questions

Is SignPrep free?
SignPrep is free to download, with no in-app purchases.
Is Sigma Notepad Calculator free?
Sigma Notepad Calculator is free to download, with in-app purchases available.
Do SignPrep or Sigma Notepad Calculator have ads?
Neither SignPrep nor Sigma Notepad Calculator shows ads.
Which is updated more often, SignPrep or Sigma Notepad Calculator?
SignPrep ships an update every 3 days, and Sigma Notepad Calculator every 4 weeks. Most recently, SignPrep was updated on October 19, 2026 and Sigma Notepad Calculator on October 8, 2026.

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