Comparison

Geometry Calculator vs Rereminder

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

Head to head
About

Geometry Calculator

Perform a wide range of geometric calculations for various shapes including triangles, rectangles, circles, and prisms. Features an intuitive interface with instant recalculations and interactive visualizations. Customize units and decimal places for precise results.

Highlights
  • Calculate angles, sides, perimeter, and area
  • Supports triangles, rectangles, circles, spheres, cones, trapezoids, parallelograms, cylinders, and rectangular prisms
  • Instant recalculations based on input
  • Interactive animated visualizations
  • Customizable units of measurement
  • Selectable number of decimal places
Features
Read full description

An application for calculating angles, sides, perimeter, area, and volume for triangles, rectangles, circles, spheres, cones, trapezoids, parallelograms, cylinders, and rectangular prisms is a versatile and convenient tool designed to help you perform a wide range of geometric calculations quickly and easily. Whether you are a student, a professional, or a DIY enthusiast, this geometry calculator can be a useful tool for solving everyday tasks. Depending on the selected shape, the calculator allows different types of calculations. For triangles, you can calculate angles, sides, perimeter, and area. For rectangles, side lengths, perimeter, and area are available. For circles, you can calculate radius, diameter, circumference, and area, as well as the volume and surface area of a sphere. For rectangular prisms, you can calculate side lengths, base area, surface area, and volume. The app features a simple and intuitive interface that allows you to easily enter values and quickly obtain results. After entering any parameter, the shape is recalculated instantly based on the latest input. An interactive animated visualization provides a clearer representation of the shape and the changes applied to it. Units of measurement for angles, length, area, and volume, as well as the number of decimal places, can be selected for convenient calculations. The geometry calculator is a practical tool that helps you easily perform a wide range of geometric calculations.

About

Rereminder

Receive timely alerts before your timers expire, ensuring you're always prepared. Customize pre-alerts with specific messages and durations. Integrates with Dynamic Island and Apple Watch for seamless tracking.

Highlights
  • Pre-alerts before timer ends
  • Customizable alert timing and messages
  • Dynamic Island & Live Activity integration
  • Apple Watch support
  • Timer templates
  • Labels and colors for organization
  • Overtime tracking
Features
Read full description

Get warned before time runs out. 5 minutes before your presentation ends. 3 minutes before the meeting wraps up. 1 minute before your workout is over. Rereminder sends step-by-step alerts before your timer hits zero, so you're always prepared and never caught off guard. PRE-ALERTS — The Feature Other Timers Don't Have Most timers only alert you when time is up. Rereminder alerts you before it's up. - Set alerts at 1, 3, 5, 10, 15, or 30 minutes before end - Customize the timing to fit your needs - Add custom messages to each alert e.g., "Wrap up your slides", "Start cooldown" KEY FEATURES - Dynamic Island & Live Activity See your timer in real-time without unlocking your phone - Apple Watch Start, pause, and track timers from your wrist - Timer Templates Save your favorite setups and launch them instantly - Labels & Colors Organize timers by purpose — Presentation, Meeting, Exercise, Study - Sound & Vibration Choose the right alert style for any situation - Overtime Tracking Keep counting after the timer ends so you know how far over you went PERFECT FOR - Speakers who need to pace their presentations - Meeting hosts who respect everyone's time - Athletes managing rest intervals between sets - Students using Pomodoro with staged alerts - Coaches and mentors running timed sessions WHY "Rereminder"? re + reminder = remind you again We remind you before it's too late — again and again. No ads · No forced subscriptions · No internet required

Screenshots

Geometry Calculator4 screens
Rereminder4 screens

Verdict

The call

The clearest difference is review sentiment: Geometry Calculator at 100% against Rereminder's 50%. Geometry Calculator also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 1). Rereminder's advantage is update cadence (every 3 days vs every 2 months). On price, ratings volume, ads 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. Rereminder sells 1 one-off in-app purchase. Geometry Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Geometry Calculator holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 5 respectively. Written reviews point the same way: 100% of Geometry Calculator's written reviews are positive against 50% of Rereminder's.

UpkeepUpdate frequency

Geometry Calculator ships an update every 2 months, Rereminder every 3 days. The most recent releases landed on September 21, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
Geometry Calculator versus Rereminder: the parameters behind the verdict, then further details
ParameterGeometry CalculatorRereminder
PriceFreeFree
Rating5.0 (8 ratings) — better4.4 (5 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings8 — better5
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17 — better26.0
Further details — not scored
Size2 MB12 MB
Age rating4+4+
DeveloperAndrey Russkinhyunho lee

Customer experience

Geometry Calculator

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Rereminder

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

Geometry Calculator

No in-app purchases

1 purchases

Rereminder

One-time1
  • 두번알림 pro$4.99

Questions

Is Geometry Calculator free?
Geometry Calculator is free to download, with no in-app purchases.
Is Rereminder free?
Rereminder is free to download, with in-app purchases available.
Which has better reviews, Geometry Calculator or Rereminder?
Geometry Calculator is rated higher. Geometry Calculator averages 5.0 out of 5 from 8 ratings, while Rereminder averages 4.4 from 5 ratings.
Do Geometry Calculator or Rereminder have ads?
Neither Geometry Calculator nor Rereminder shows ads.
Which is updated more often, Geometry Calculator or Rereminder?
Geometry Calculator ships an update every 2 months, and Rereminder every 3 days. Most recently, Geometry Calculator was updated on September 21, 2026 and Rereminder on October 2, 2026.

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