Not Another Twin Calculator vs Focus Protocol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Not Another Twin Calculator
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This is a straightforward dual calculator designed for real work. You get two clean calculators side-by-side, so you can compare numbers, transfer results between panels, and keep moving. What it does: Two calculators in one screen for fast side-by-side work Move results between calculators with a tap Separate history for each calculator Basic calculations only — no clutter, no gimmicks Works smoothly on iPhone and iPad Why it exists: Most calculators keep adding “features” that slow you down. This one stays focused: quick, readable, and practical. If you want a calculator that feels like the classic tools—simple, reliable, and efficient—this is it. ——— Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://andyarevalo.com/privacy.html Terms of Service: https://andyarevalo.com/terms.html Support: https://andyarevalo.com/support.html
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: Not Another Twin Calculator at Free against Focus Protocol's $0.99. Not Another Twin Calculator also leads on iOS requirement (16.0 vs 26.0). On update cadence, 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
Not Another Twin Calculator is free to download; Focus Protocol costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Not Another Twin Calculator ships an update every 2 months, Focus Protocol every 6 weeks. The most recent releases landed on October 25, 2026 and October 15, 2026 respectively.
| Parameter | Not Another Twin Calculator | Focus Protocol |
|---|---|---|
| Price | Free — better | $0.99 |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 10 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Andy Arevalo | Alice-Georgiana TURCANU |
In-app purchases
Not Another Twin Calculator
No in-app purchases
Focus Protocol
No in-app purchases
Questions
Is Not Another Twin Calculator free?
Is Focus Protocol free?
Do Not Another Twin Calculator or Focus Protocol have ads?
Which is updated more often, Not Another Twin Calculator or Focus Protocol?
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