Comparison

Calculator + vs OpenSpace Parking

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

Head to head
About

Calculator +

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

Highlights
  • Free basic and scientific calculator
  • Intuitive interface with equation and result display
  • Fraction and percent support
  • Advanced editing capabilities
  • Polynomial and linear equation solver
  • Graphing calculator
  • Unit conversion and geometric calculators
Features
Read full description

Award winning calculator app for iPad and iPhone. Designed with simplicity, usability and beauty in mind! FEATURES: - Free basic calculator - Free scientific calculator - Elegant & Intuitive interface - Advanced editing by easily going back and forth - Displays both the equation & the result at the same time - Supports Fraction & Percent - Supports many scientific functions If you are looking for more advanced features you can upgrade to one or more of the following: - Fraction Calculator with feet, inches & cm support! - Solving for x with a polynomial Calculator for solving quadratic & cubic equations 2x³ - 4x² - 22x + 24 = 0 - Linear Equations Solver for solving system of linear equations 2x – y = 9 3x + 4y = –14 - Graphing Calculator to find the local min, max & intersection points y = 2x³ – 4x (x² + y²)³ = -27y²x² - Triangle Calculator - Cone Calculator - Arc Calculator - Circle Calculator - Base Converter ( HEX OCT BIN DEC ) - Multiple themes Enjoy the FREE Scientific calculator on your iPhone & iPad. If you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

OpenSpace Parking

Instantly check real-time parking space availability at various locations. View available spots, distances, and navigate directly using Google Maps. Smart color-coding helps you quickly identify parking lot occupancy levels.

Highlights
  • Real-time space availability
  • Distance from current location
  • Map view of locations
  • Google Maps navigation integration
  • Smart color-coding for occupancy
  • Search by provider name
Features
Read full description

TheOpenSpace Parking mobile app connects your mobile device instantly to the cloud so you can check real-time space availability by parking location. Navigation with ease On the app home screen, you'll find a list of all available parking spaces at your facilities. Your Home screen not only displays the number of available parking spaces in a location, but also the distance from your current location, and the location on the map. Need directions? Just tap Route to open the location on Google Maps. You can also search for the name of a provider from the homescreen. Homescreen Lists the number of available parking spaces in the parking location and the distance from your current location. Tap to view total spaces, available spaces, and the map view of the location. Tap Route to open the location on Google Maps and to obtain directions. You can edit the location name as required. Smart color coding We've madeit eveneasier to spot available parking spaces with our smart color-coding system. The Available Spaces totals display in Green, Yellow, or Red, with the percentage of availability per color code configurable by your provider. For example, green would typically indicate the parking location has plenty of space. Yellow typically would indicate the parking lot has significant occupancy, and Red, would mean that there are very few remaining spaces. Location full? Whenalocation is full or nearly full, the app reflects the current status, ensuring you never waste time searching for a spot that doesn't exist

Screenshots

Calculator +1 screens
OpenSpace Parking4 screens

Verdict

The call

The clearest difference is review sentiment: Calculator + at 85% against OpenSpace Parking's 0%. Calculator + also leads on rating (4.6 vs 1.0) and update cadence (every 5 days vs every 3 months). OpenSpace Parking's advantage is in-app purchases (none vs 12) and ads (none vs shown). On price, device support and iOS requirement 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 12 in-app purchases, starting at $4.99 per month. OpenSpace Parking asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Calculator + holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of Calculator +'s written reviews are positive against 0% of OpenSpace Parking's.

UpkeepUpdate frequency

Calculator + ships an update every 5 days, OpenSpace Parking every 3 months. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 level
Calculator + versus OpenSpace Parking: the parameters behind the verdict, then further details
ParameterCalculator +OpenSpace Parking
PriceFreeFree
Rating4.6 (10K ratings) — better1.0 (1 ratings)
Positive reviews84.9% of reviews — better0.0% of reviews
Number of ratings10K — better1
Update frequencyEvery 5 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size49 MB55 MB
Age rating4+4+
DeveloperxNeat.comLogixITS

Customer experience

Calculator +

All ratings10,181 ratings
Positive91.8%
Neutral2.8%
Negative5.4%
Written reviews941 reviews
Positive84.9%
Neutral4.0%
Negative11.1%

OpenSpace Parking

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Calculator +

Reported bugs

5 issues
  • Fraction calculator has TWO subtraction buttons and NO division button
  • Decimals seem to be changed to fraction with no apparent way of changing it back
  • Functionality is dropped by forcing you to the main menu every time you open it
  • Currency converter broken
  • Login screen freezes

Requested features

5 requests
  • Add mod function
  • Add commas
  • Add 1/x function
  • Support for Retina Display
  • Add number 4 with two lines

OpenSpace Parking

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Calculator +

Subscriptions2
  • Scientific Calculator3 Days trial$4.991 Month
  • Calculator7 Days trial$39.991 Year
One-time10
  • Linear Calculator$2.99
  • Factoring Calculator$2.99
  • Handwriting Calculator$2.99
Show 7 more
  • Currency Converter$2.99
  • Themes Pack$2.99
  • Graphing Calculator$3.99
  • Fraction Calculator$3.99
  • Scientific Calculator$4.99
  • Calculator Plus$4.99
  • Calculator$16.99
None

OpenSpace Parking

No in-app purchases

Questions

Is Calculator + free?
Calculator + is free to download, with in-app purchases available.
Is OpenSpace Parking free?
OpenSpace Parking is free to download, with no in-app purchases.
Which has better reviews, Calculator + or OpenSpace Parking?
Calculator + is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while OpenSpace Parking averages 1.0 from 1 ratings.
Do Calculator + or OpenSpace Parking have ads?
Calculator + shows ads; OpenSpace Parking does not.
Which is updated more often, Calculator + or OpenSpace Parking?
Calculator + ships an update every 5 days, and OpenSpace Parking every 3 months. Most recently, Calculator + was updated on October 14, 2026 and OpenSpace Parking on October 1, 2026.

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