Ark vs KCalc Lock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ark
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Con “Ark” il piacere di leggere l’Architettura diventa interattivo! Lettura: Puoi scegliere l’ultimo numero, o un’edizione dell’archivio, e consultare gratuitamente le prime dieci pagine o acquistare l'edizione completa. Sfogliando le pagine della rivista, ingrandendo i contenuti, ruotando il dispositivo, sarai libero di leggere in piena comodità e nella modalità preferita. Shop: Grazie all'accesso diretto allo shop puoi acquistare una copia della rivista al prezzo di 1,99€. Di seguito il link alle Privacy Policy: https://goo.gl/O0z4ma Ricerca: Cerchi un numero specifico o vuoi trovare un contenuto particolare? Nessun problema, con questa applicazione hai a disposizione l’intero archivio da consultare e ricercare come e quando vuoi. Condivisione: Non vuoi perdere un articolo o c’è un contenuto speciale che vuoi avere sempre con te? Niente di più semplice grazie all’area dei preferiti. In più, se vuoi condividere un contenuto, c’è la funzione di invio per e-mail, la condivisione su Facebook & Twitter! Funzionalità Extra: - Anteprima ultima edizione e delle edizioni passate; - Archivio edizioni passate; - Possibilità di ricerca nell’intero archivio e acquisto copie arretrate; - Salvataggio pagine nei preferiti; - Invio ritagli pagina per e-mail, condivisione su Facebook e Twitter; - Consultazione degli acquisti effettuati da iPhone/iPad anche da Mac/PC; NOTA: Per un utilizzo ottimale dell'App è richiesto iOS 5.0 o superiore.
KCalc Lock
Secure your personal data with multi-layered protection. Lock sensitive apps, photos, and files with password or biometric authentication. Features a private photo vault and a dual privacy shield for enhanced discretion.
- Password and biometric protection
- One-tap app locking
- Private photo vault
- Customizable app icon
- Dual privacy shield (Second Space)
- Auto-lock feature
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KCalc – Your Fully Private & Secure Space With KCalc Privacy Lock, your personal data is protected by multi-layered security. No more worrying about friends or colleagues accidentally accessing your secret apps, photos, or files. • Password & Biometric Protection Secure your space with a strong password or unlock seamlessly via Face ID. • One-Tap Protection Instantly protect sensitive apps with a single tap. Enable the auto-lock feature for enhanced convenience and security. • Private Photo Vault Safely store confidential photos in an encrypted gallery, safeguarded from prying eyes. • Custom App Icon Personalize the app icon to match your style. Choose from multiple icon options for a truly private and personalized experience. • Dual Privacy Shield When asked to unlock under scrutiny, enter the guest passcode to instantly switch to Second Space — your private data stays fully hidden while showing pre-set content. Download KCalc Privacy Lock now and take full control of your digital privacy — fast, smart, and secure. Pro Subscription Information KCalc offers an auto-renewable Pro subscription (monthly). Subscribing unlocks all Pro features in the app. - Payment: Payment will be charged to your Apple Account at confirmation of purchase. - Auto-Renewal: Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. - Manage or Cancel: You can manage your subscription and turn off auto-renewal at any time in Settings → tap your name → Subscriptions. Terms of Use: https://dawn-zephyr-0e3.notion.site/Terms-of-Use-End-User-License-Agreement-3dc70fc5aff880d382dcca2c6441df51 Privacy Policy: https://dawn-zephyr-0e3.notion.site/Private-Policy-3dc70fc5aff880e783aed858da8eaad2 Feedback & Support: aiseaystudio@gmail.com
Screenshots
Verdict
The clearest difference is ads: KCalc Lock at none against Ark's shown. KCalc Lock also leads on update cadence (every 5 days vs every 9 months). Ark's advantage is iOS requirement (11.2 vs 16.0). On price, 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. Ark sells 1 one-off in-app purchase and KCalc Lock sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
Ark ships an update every 9 months, KCalc Lock every 5 days. The most recent releases landed on October 14, 2026 and October 30, 2026 respectively.
| Parameter | Ark | KCalc Lock |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (45 ratings) — better |
| Positive reviews | — | 97.1% of reviews |
| Number of ratings | — | 45 — better |
| Update frequency | Every 9 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.2 — better | 16.0 |
| Further details — not scored | ||
| Size | 31 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Sesaab Servizi Srl | 海芸 吴 |
Bugs and requests
Ark
Not enough reviews yet to summarise bugs or requests.
KCalc Lock
Reported bugs
1 issue- Cannot see photos after being locked out
Requested features
2 requests- Add shortcut integration
- Option for Apple Calculator icon
In-app purchases
Ark
- Copia Singola$1.99
KCalc Lock
- Pro Monthly$5.991 Month
- Pro Lifetime Access$39.99









