Calculator83 vs FEUrea Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator83
A minimalist calculator app focused on simplicity and a clean workflow. It offers both basic and scientific modes, allowing users to perform calculations without complex settings. Get started quickly with this straightforward tool.
- Minimalist design
- Clean workflow
- Basic mode
- Scientific mode
- Easy to use
Read full descriptionHide full description
Calculator83 is a minimalist calculator designed with simplicity to the core and an emphasis on a clean workflow. Be up and running in seconds! Featuring two modes of operation, basic and scientific. The goal of this app is to allow users to have a powerful calculator without the fuss of learning all the settings of a powerful calculator.
FEUrea Calculator
Read full descriptionHide full description
Fractional Excretion of Urea (FEUrea). Quick and easy to use FEUrea calculator. Enter required data to get FEUrea percentage result: Serum Urea/BUN: mg\dL or mmol/L Serum Creatinine: mg\dL or µmol/L Urine Urea: mg\dL or mmol/L Urine Creatinine: mg\dL or µmol/L No fuss calculator. It does what it says on the tin.
Screenshots
Verdict
The clearest difference is update cadence: FEUrea Calculator at every 5 months against Calculator83's every 20 months. FEUrea Calculator also leads on iOS requirement (12.1 vs 15.0). 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. Neither carries in-app purchases, so what you see is what you pay.
Calculator83 ships an update every 20 months, FEUrea Calculator every 5 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.
| Parameter | Calculator83 | FEUrea Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 20 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 10 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Lyker Labs LLC | Krzysztof Gwiazda |
In-app purchases
Calculator83
No in-app purchases
FEUrea Calculator
No in-app purchases
Questions
Is Calculator83 free?
Is FEUrea Calculator free?
Do Calculator83 or FEUrea Calculator have ads?
Which is updated more often, Calculator83 or FEUrea Calculator?
Other comparisons
