Acute Calculator vs CalcFlex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Acute Calculator
This advanced graphing calculator offers a visual editor and supports over 30 functions. It includes features like a history tape, variable storage, and an intuitive palette system for complex calculations.
- Visual editor
- 30+ functions supported
- History tape
- Store variables
- Intuitive palette system
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+ Easy to use visual editor + Supports 30+ functions + Intuitive palette system + Comes with history tape + Store variables for later + No ads or subscriptions Terms of Use: https://acutecalc.app/terms Privacy Policy: https://acutecalc.app/privacy
CalcFlex
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Discover CalcFlex: Flexible, Free and Ad-Free Calculator App! Unlock the full potential of your calculations with CalcFlex, the flexible calculator app designed to cater to all your needs. Whether you're dealing with complex equations, unit conversions, financial calculations, or scientific formulas, CalcFlex has got you covered. Key Features: Multiple Calculators in Parallel: Seamlessly switch between different calculators for efficiency. Built-in Tools: Access unit converters, finance calculators, math and physics equations all in one app. Custom Equations: Create, save, and reuse your own equations with specific variables tailored to your needs. User-Friendly Design: Start with the familiar calculator layout, free to customize based on preference. Completely Free: No ads, no hidden fees, just pure calculating power. Download CalcFlex now and experience the freedom of a truly flexible and comprehensive calculator app!
Screenshots
Verdict
The clearest difference is update cadence: Acute Calculator at every 2 days against CalcFlex's every 9 days. On price, ads, in-app purchases 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
Both are free to download. Acute Calculator sells 3 one-off in-app purchases and CalcFlex sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Acute Calculator ships an update every 2 days, CalcFlex every 9 days. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.
| Parameter | Acute Calculator | CalcFlex |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (117 ratings) — better | — |
| Positive reviews | 94.9% of reviews | — |
| Number of ratings | 117 — better | — |
| Update frequency | Every 2 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 16 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Find App, Inc. | Daniel Chiu Loong Ng |
Bugs and requests
Acute Calculator
Reported bugs
6 issues- Animation and UI bugs
- Discount button crashes app
- Animation lags and skips when sliding down history
- Calculations are incorrect
- Does not follow correct order of operations
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- Transition for history is slow
Requested features
11 requests- Make app icon simpler/restrained
- Add units to graph
- Allow press and hold on graph lines for values
- Support Korean language
- Display commas while entering numbers
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- Double-tap to recenter graph interface
- Ability to solve for a variable
- Dedicated button for +/-
- Option to pin in control center
- Make comma separator format selectable
- Improve app icon design
CalcFlex
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Acute Calculator
- Acute Plus Limited-Time Offer$3.49
- Acute Plus (For Students)$4.99
- Acute Plus (One Time)$6.99
CalcFlex
- +3 New Variables2 variants$1.99
- +20 New Equation Slots2 variants$1.99
- +1 New Calculator2 variants$3.99
