Comparison

Dev Calc vs Notion Calendar

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

Head to head
About

Dev Calc

This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.

Highlights
  • Numeric conversion (Bin, Oct, Dec, Hex)
  • Signed/Unsigned options
  • Adjustable bit sizes (8, 16, 32, 64)
  • RGB, HSL, HSV color code generation
  • Color picker
  • Preset color options
Features
Read full description

You can convert numeric to Bin, Oct, Dec, Hex immediately with Signed, Unsigned. ** Introduction ** This is a calculator app to help System Developers and Programmers. Convert numeric to binary, octal, decimal, hex immediately. You can set conversion bit number and signed/unsigned, so you can adjust settings for binary, short, int, long. Also you can get clolor code for system application from RGB and Color Picker. And you can choose preset color simply. ** Overview ** - Convert numeric to binary, octal, decimal, hex immediately. - You can edit each digits for detailed confirmation. - You can get color code from RGB, HSL, HSV and Color Picker. - Using preset color, you can get color code quickly. ** Characteristics ** >> Numeric conversion - You can input numeric in binary, octal, decimal, hex. - You can choose bits size from 8bits, 16bits, 32bits, 64bits. - You can choose signed numeric or unsigned numeric. - you can edit each digits directly. >> Color code - You can see a color code in Hex, RGB, HSL and HSV. - Support alpha channel of color. - You can get a color code from RGB, HSL, HSV adjuster and Color Picker. - You can get a color code just by choosing a preset color. ** Terms of Use ** https://coconutsdevelop.com/en/terms/terms_of_use.html ** Developer website ** https://coconutsdevelop.com/

About

Notion Calendar

Effortlessly manage your schedule and meetings with a unified calendar view. Seamlessly integrate with Google Calendar and Notion to keep all your work and life events in one place. Offers multiple time zone support and customizable widgets for quick access to your schedule.

Highlights
  • Deep Google Calendar integration
  • Connects with Notion documents and projects
  • Multiple time zone support
  • Unified view across multiple calendars
  • Home Screen and Lock Screen widgets
  • Available in 12 languages
Features
Read full description

Notion Calendar lets you schedule meetings and control your time like never before. It deeply integrates with Google Calendar accounts so that all your events are synced. Along with speed, beauty, and light/dark modes, Notion Calendar includes powerful features: - CONNECTED TO NOTION — add Notion docs, projects, and timelines. - MULTIPLE TIME ZONES — pull the time zone column to the right to “travel to any city” and add more time zones. - ALL IN ONE PLACE — see one unified view across multiple calendars and auto-sync events between them. - WIDGETS — select from 6 Home Screen Widgets featuring rich previews of upcoming events, month overviews, quick-add event buttons, and more! The Lock Screen Widget lets you see what’s coming at a glance when picking up your phone. - AVAILABLE IN 12 LANGUAGES — Japanese, Korean, French, German, Spanish, Portuguese, Danish, Dutch, Finnish, Norwegian, and Swedish. It’s time.

Screenshots

Dev Calc4 screens
Notion Calendar4 screens

Verdict

The call

The clearest difference is rating: Notion Calendar at 4.7 against Dev Calc's 2.0. Notion Calendar also leads on in-app purchases (none vs 1) and ads (none vs shown). Dev Calc's advantage is review sentiment (60% vs 39%) and iOS requirement (13.0 vs 18.0). 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. Dev Calc sells 1 in-app purchase, starting at $1.99 per month. Notion Calendar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Notion Calendar holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Notion Calendar has 7.8K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 60% of Dev Calc's written reviews are positive against 39% of Notion Calendar's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Dev Calc ships an update every 2 months, Notion Calendar fortnightly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard8 real differences · 2 level
Dev Calc versus Notion Calendar: the parameters behind the verdict, then further details
ParameterDev CalcNotion Calendar
PriceFreeFree
Rating2.0 (2 ratings)4.7 (7.8K ratings) — better
Positive reviews60.0% of reviews — better39.0% of reviews
Number of ratings27.8K — better
Update frequencyEvery 2 monthsFortnightly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size51 MB68 MB
Age rating4+4+
DeveloperToshiya HondoNotion Labs, Incorporated

Customer experience

Dev Calc

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Notion Calendar

All ratings7,750 ratings
Positive93.4%
Neutral2.4%
Negative4.2%
Written reviews1,863 reviews
Positive39.0%
Neutral21.3%
Negative39.7%

Bugs and requests

Dev Calc

Not enough reviews yet to summarise bugs or requests.

Notion Calendar

Reported bugs

4 issues
  • App crashes when trying to add events
  • Syncing issues causing events to disappear or display incorrectly
  • Time zone issues leading to incorrect event times
  • Widgets not updating properly

Requested features

6 requests
  • Add monthly and weekly calendar views
  • Integrate with more calendar providers (Microsoft, Apple, etc.)
  • Improve iPad compatibility and optimize for larger screens
  • Add task management and to-do list functionality
  • Enhance customization options (colors, themes, etc.)
Show 1 more
  • Improve event creation and editing experience

In-app purchases

1 purchases

Dev Calc

Subscriptions1
  • Remove Ads (Monthly)$1.991 Month
None

Notion Calendar

No in-app purchases

Questions

Is Dev Calc free?
Dev Calc is free to download, with in-app purchases available.
Is Notion Calendar free?
Notion Calendar is free to download, with no in-app purchases.
Which has better reviews, Dev Calc or Notion Calendar?
Notion Calendar is rated higher. Dev Calc averages 2.0 out of 5 from 2 ratings, while Notion Calendar averages 4.7 from 7.8K ratings.
Do Dev Calc or Notion Calendar have ads?
Dev Calc shows ads; Notion Calendar does not.
Which is updated more often, Dev Calc or Notion Calendar?
Dev Calc ships an update every 2 months, and Notion Calendar fortnightly. Most recently, Dev Calc was updated on November 3, 2026 and Notion Calendar on November 5, 2026.

Other comparisons