Comparison

Calculator # vs Blastoff

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

Head to head
About

Calculator #

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Highlights
  • Math Photos Solver
  • Handwriting Recognition
  • AI Math Problem Solver
  • Mathematical Display
  • Equation Solvers
  • 2D Graphing
  • Algebraic Functions
Features
Read full description

◉ Over 11,000,000 Downloads Worldwide ◉ Top Free Utilities Apps in US, UK, AUS, CAN, GER,... ◉ Rated & Reviewed on ILoveFreeSoftware.com FREE Alternative to Graphing TI-83, TI-84, TI-89, Casio FX, Sharp EL,... Calculator # – The free, multi-function calculator for iPhone/iPad is proud to offer a variety of features to satisfy wide ranges of customers: The App possesses a powerful math core and algebra engine with mathematical display support, making it a viable tool for everyone from those looking for basic calculation to more advanced users, such as scientific computation, engineers, and math students. Calculator # makes available everything you need – including a user manual and tutorial video clips – so you can master the app in a matter of minutes! ◉ Official Website: http://iPhoneCalculator.com ◉ ADVANCED FEATURES: ▸ Math Photos Solver * ▸ Handwriting Recognition * ▸ Math Problem Solver (AI) * ◉ GENERAL FEATURES: ▸ Universal Calculator App ▸ Support All the Latest Devices ¹ ▸ Support Multitasking (iPad) ▸ Support Wireless KB ² ▸ Mathematical Display ▸ Edit & Export Expression/Result ▸ History Tape View ▸ Basic Calculations (+, -, x, ÷, %, Abs,...) ▸ Advanced Functions (Sin,Cos,Ln,X!, ^, √,…) ▸ 14 Memory Variables (Including X,Y,Z,M) ▸ Assignment Operator ▸ F(x) Customize Functions (F1 Only) ▸ Fraction and Degree/Angle Calculation ▸ Numeric Integral Calculation ▸ Dual Skins (Silver Light & Carbon+) ◉ ALGEBRA FEATURES: ▸ Big Integer & Rational Number (Up to 30!) ▸ Expand and Factor Polynomials ▸ Basic Indefinite integral ◉ EQUATIONS SOLVERS: ▸ Quadratic Equations ▸ System of Linear Equations (2 Unknowns) ◉ 2D GRAPH: ▸ Snap to Points ▸ Smooth Zoom & Transformation ▸ Support F(X,Y) = 0. E.g. Sin(X) + Cos(Y) = 0. ◉ MULTIPLE LANGUAGES: ▸ English, Spanish, German, ▸ French, Japanese, Chinese (*) In-App-Purchase is required ¹: Include iPhone 6/6S+ HD Retina Display ²: Standard English KB We love your feedback, Thanks a lot ! Terms of Service: https://iphonecalculator.com/terms-of-service/

About

Blastoff

Features
Read full description

Stop wasting time copying and pasting the same text to multiple people. Blastoff makes it incredibly simple to send personalized group messages in seconds, without group chat clutter! Whether you are sending event invitations, business follow-ups, holiday greetings, team updates, or payment reminders, Blastoff personalizes each message automatically so your recipients feel like you wrote it just for them. Key Features: Smart Personalized Templates: Save your go-to messages as templates. Use placeholders like {name}, {fname} (first name only), or {lname} (last name only) to automatically insert personalized contact details into each text. Organize with Custom Groups: Easily create, edit, and organize contacts into custom groups (e.g., Friends, Clients, Soccer Team). Contacts can belong to multiple groups simultaneously for ultimate flexibility. A-Z Quick-Scroll Sidebar: Find what you need instantly. Use our beautiful, fluid A-Z index sidebar to navigate huge lists of contacts, groups, and templates in a single swipe. Seamless Contact Importer: Easily select and import contacts directly from your device with our clean, custom picker. Blast Messages Safely: Select a template, choose your group, and launch! Blastoff loads each personalized text directly into your native messaging app so you are always in full control before hitting send. How it Works in 3 Easy Steps: Write: Select or create a message template (e.g., "Hey {fname}, just a reminder...") Select: Choose one of your groups or select individual contacts. Blastoff! Send your queue of personalized messages one by one in seconds. Upgrade to Blastoff Premium (One-Time Lifetime Access): Unlock unlimited contacts (Free limit: 25) Create unlimited recipient groups (Free limit: 3) Save unlimited templates (Free limit: 3) Enjoy a 100% Ad-Free experience Download Blastoff today and elevate your messaging speed!

Screenshots

Calculator #4 screens
Blastoff4 screens

Verdict

The call

The clearest difference is update cadence: Blastoff at daily against Calculator #'s every 2 months. Calculator #'s advantage is device support (3 vs 1) and iOS requirement (12.1 vs 26.4). On price, 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. Calculator # sells 6 in-app purchases, starting at $1.49 per month and Blastoff sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Calculator # ships an update every 2 months, Blastoff daily. The most recent releases landed on September 30, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 7 level
Calculator # versus Blastoff: the parameters behind the verdict, then further details
ParameterCalculator #Blastoff
PriceFreeFree
Rating4.6 (36K ratings) — better—
Positive reviews59.9% of reviews—
Number of ratings36K — better—
Update frequencyEvery 2 monthsDaily — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.1 — better26.4
Further details — not scored
Size57 MB10 MB
Age rating4+4+
DeveloperIncpt.MobisChristian Archilla

Bugs and requests

Calculator #

Reported bugs

3 issues
  • Crashes when trying to use certain functions
  • Handwriting recognition not working reliably
  • Inability to input negative numbers

Requested features

3 requests
  • Add option to turn off animation
  • Improve ad placement to avoid obstructing usage
  • Provide more transparency on paid features

Blastoff

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Calculator #

Subscriptions4
  • PRO Upgrade 1 Month3 Days trial$1.491 Month
  • PRO Upgrade 3 Months7 Days trial$2.993 Months
  • PRO + Recognition 1 Month$4.991 Month
Show 1 more
  • PRO + Recognition 3 Months$11.993 Months
One-time2
  • 250 AI Recognition & Queries$0.99
  • 600 AI Recognition & Queries$1.99
1 purchases

Blastoff

One-time1
  • Blastoff Premium$0.99

Questions

Is Calculator # free?
Calculator # is free to download, with in-app purchases available.
Is Blastoff free?
Blastoff is free to download, with in-app purchases available.
Do Calculator # or Blastoff have ads?
Both Calculator # and Blastoff show ads.
Which is updated more often, Calculator # or Blastoff?
Calculator # ships an update every 2 months, and Blastoff daily. Most recently, Calculator # was updated on September 30, 2026 and Blastoff on September 20, 2026.

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