Calc vs Focus Protocol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc
This app offers a high-precision scientific calculator with over 50 digits of accuracy. It supports advanced mathematical functions, complex arithmetic, and programmable features for derivatives, integrals, and root finding.
- High-precision calculations (50+ digits)
- Extensive mathematical functions
- Programmable features
- Complex arithmetic
- Graphing capabilities
- Derivative and integral calculation
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Calc-50 is a high-precision scientific graphing RPN calculator. It carries over 50 digits of accuracy and has a large number of mathematical functions, including trig and hyperbolic functions and their inverses, and math special functions such as gamma, beta, psi, exponential integral, sine, cosine, and log integrals, Bessel functions, and more. It is programmable, with functions that take user functions and find derivatives, integrals, function max/min, and roots. Calc-50 also provides complex arithmetic and elementary functions.
Focus Protocol
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Silence the noise. Enter the protocol. FocusProtocol is not just a timer. It is a system designed to induce and sustain the flow state. By combining military-grade app blocking with psycho-acoustic audio engineering, FocusProtocol removes willpower from the equation. Zero distractions Engage the Shield to lock down distracting apps and websites instantly. Built on Apple’s native Screen Time API to create a breach-proof environment. Leaving the protocol requires a conscious decision to fail. Neural audio Enter deep work with our proprietary pink noise engine. Unlike white noise, pink noise reduces brain-wave complexity, promoting stable attention while masking interruptions without fatigue. Global pulse You are not alone. View the live active protocols counter and work alongside thousands in real time. Synchronize your energy with a global rhythm of productivity. Rituals and rewards Dopamine is a tool. Use it deliberately. Completion rituals reinforce your success loop and lock in momentum. OLED-optimized Designed for night owls and early risers. A true-black interface reduces eye strain and preserves battery during long sessions. FocusProtocol Control the environment. Enter flow. Execute.
Screenshots
Verdict
The clearest difference is price: Calc at Free against Focus Protocol's $0.99. Calc also leads on iOS requirement (12.0 vs 26.0). Focus Protocol's advantage is update cadence (every 6 weeks vs every 10 months). On 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
Calc is free to download; Focus Protocol costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calc ships an update every 10 months, Focus Protocol every 6 weeks. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.
| Parameter | Calc | Focus Protocol |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 3.7 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 10 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 38 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | David Smith | Alice-Georgiana TURCANU |
In-app purchases
Calc
No in-app purchases
Focus Protocol
No in-app purchases









