Comparison

Calculator Notes vs Due2

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

Head to head
About

Calculator Notes

This app combines a calculator with spreadsheet functionality, allowing users to automatically sum item values. It supports unlimited folders and notes, with features like goal setting and batch operations. Widgets are available for home and lock screens.

Highlights
  • Automatic total value calculation
  • Unlimited folders, notes, and items
  • CSV output and sharing
  • Goal setting and progress tracking
  • Batch operations (copy, duplicate, color coding)
  • Home & lock screen widgets
  • Dark mode
Read full description

It is a calculator notepad that automatically calculates the total value. A simple spreadsheet application. Widget compatible. All features are completely free to use. - Unlimited folders/notes/items - Automatically calculate the total value of items - CSV output / save file / share to SNS - Set goals and deadlines and display percentages - Batch operations such as copy/duplicate/color coding - filter and sort - Consumption tax calculation and fixed cost settings - Easy input from history - Home & lock screen widget support - dark mode

About

Due2

Features
Read full description

Ask AI to create schedules, grab items shared by others, and manage deadlines together in groups. Your data stays encrypted, syncs across phone, watch, and PC, and connects with other AI tools via CLI. [Key Features] - Dashboard: see urgent / this month / upcoming at a glance - Easy Mode: large text and simplified screens for everyone - 4-digit PIN: lock with just 4 digits instead of a complex password - AI Search: find items in natural language; AI auto-adds deadlines - AI Goal Planner: let AI generate a schedule to reach your goals - AI extraction: paste text or snap a photo — AI finds deadlines and adds them - Push alerts at your chosen timing: D-30, D-7, D-1, D-day, and more - Recurring schedules: auto-renew monthly or yearly, zero re-entry - Group sharing: create multiple groups, share with family or team, transfer ownership - Group chat: discuss schedules in real time with E2EE group chat - Public packs: browse and follow schedule packs by other users, add to your own - Calendar import: pull events from your device calendar and turn them into deadlines - Apple Watch: check deadlines on your wrist, see urgent count via complications, real-time sync and offline support - E2E encryption: memos are encrypted on-device; even Due2 servers cannot read them - TTS voice briefing: listen to your dashboard summary or let notifications read themselves - CLI / AI integration: add items from the terminal; let AI agents extract deadlines automatically - Keyboard shortcuts: quick actions on desktop - Multi-platform: sync across iPhone, macOS, and Windows - Biometric lock: protect your data with Face ID / Touch ID / fingerprint - Dark mode / Korean, English, and Japanese [Pricing] - Free: up to 10 active items, 5 group shared items - Plus: $9.99/year, up to 300 active items, 30 group shared items - Pro: $19.99/year, up to 1,000 active items, 100 group shared items Privacy Policy: https://due2.app/privacy Terms of Service: https://due2.app/terms Account & Data Deletion: https://due2.app/delete-account Support: https://due2.app/support

Screenshots

Calculator Notes4 screens
Due24 screens

Verdict

The call

The clearest difference is in-app purchases: Calculator Notes at none against Due2's 2. Due2's advantage is ads (none vs shown) and update cadence (weekly vs every 12 months). On price 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. Due2 sells 2 in-app purchases, starting at $9.99 per year. Calculator Notes asks for nothing beyond the download.

UpkeepUpdate frequency

Calculator Notes ships an update every 12 months, Due2 weekly. The most recent releases landed on September 21, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Calculator Notes versus Due2: the parameters behind the verdict, then further details
ParameterCalculator NotesDue2
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 12 monthsWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPod, Apple Watch — better
Requires iOS26.015.0 — better
Further details — not scored
Size11 MB51 MB
Age rating4+4+
DeveloperFugaPiyo Inc.MyIAM Inc.

In-app purchases

None

Calculator Notes

No in-app purchases

2 purchases

Due2

Subscriptions2
  • Due2 Plus$9.991 Year
  • Due2 Pro$19.991 Year

Questions

Is Calculator Notes free?
Calculator Notes is free to download, with no in-app purchases.
Is Due2 free?
Due2 is free to download, with in-app purchases available.
Do Calculator Notes or Due2 have ads?
Calculator Notes shows ads; Due2 does not.
Which is updated more often, Calculator Notes or Due2?
Calculator Notes ships an update every 12 months, and Due2 weekly. Most recently, Calculator Notes was updated on September 21, 2026 and Due2 on October 13, 2026.

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