Comparison

Firefox Fast & Private Browser vs CAL

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Firefox Fast & Private Browser

A fast and private web browser that protects you by default. It blocks trackers, offers private browsing, and provides tools to help you focus on content and manage your logins securely.

Highlights
  • Enhanced Tracking Protection
  • Private browsing mode
  • Page summaries
  • Built-in password manager
  • Reader Mode
  • Sync across devices
Features
Currently charting
Read full description

The internet. As it should be. Firefox is a fast, private web browser designed to protect you by default. Privacy is built in from the start, so you can focus on what matters instead of worrying about who’s watching. Why people choose Firefox: • Enhanced Tracking Protection – Blocks trackers by default to help stop companies from following you across the web. • Private browsing mode – Browse without saving your history, searches, or cookies. • Page summaries – Get the key points from long pages and move on faster. • Built-in password manager – Generate strong passwords, save them securely, and autofill logins when you need them. • Flexible search options – Choose your default search engine or switch search engines right from the search bar. • Reader Mode – Remove ads and clutter from articles so you can focus on what you’re reading. • Sync across devices – Pick up where you left off with synced tabs, bookmarks, and passwords when you sign in to your Mozilla account. Private by default Firefox is designed with privacy built in from the moment you start browsing. Enhanced Tracking Protection automatically blocks common background trackers, including social media trackers, crypto miners, and fingerprinters. When you want extra privacy, private browsing mode doesn’t save your history, searches, or cookies. Focus on what matters The web can be distracting. Firefox is designed to help you stay focused without making you manage everything yourself. Reader Mode clears clutter from articles, and picture-in-picture keeps videos visible while you multitask—without pulling focus from what you’re doing. Browse your way Customize Firefox to fit how you browse. Personalize your home screen with wallpapers and layout options, and choose your preferred search engine instead of being pushed into a single ecosystem. You can move the search bar to the top or bottom of the screen for easier one-handed browsing. Sign in to your Mozilla account to sync tabs, bookmarks, passwords, and browsing history across devices, so switching feels seamless. Built for people, not profit Firefox was created in 2004 by Mozilla as a faster, more private, and more customizable alternative to other browsers. Today, Mozilla remains a nonprofit and continues working to make the internet — and the time you spend on it — better. Learn more about Mozilla: https://www.mozilla.org Terms of Use: https://www.mozilla.org/about/legal/terms/firefox/ Privacy Policy: https://www.mozilla.org/privacy/firefox Latest news: https://blog.mozilla.org

About

CAL

Securely store photos, videos, contacts, and passwords in a locked vault. Features a private browser with ad and hacker blocking, and optional VPN for premium users. An all-in-one mobile security solution.

Highlights
  • Private photo and video vault
  • Password storage
  • Secret contact list
  • Anonymous browser with adblock
  • Virtual Private Network (VPN)
  • Encrypted data storage
Features
Read full description

CAL is a secret vault hidden behind a real calculator — with a Decoy Vault that shows harmless content to anyone who forces you to unlock it. Hide photos, videos, notes, passwords and contacts. Browse ad-free and privately. Catch intruders in the act. DECOY VAULT — THE PASSWORD THAT LIES FOR YOU Set a second, fake passcode. Enter it under pressure and CAL opens a completely different vault filled with safe, boring content. Your real photos stay invisible. Nobody can tell the difference. HIDES IN PLAIN SIGHT CAL looks and works like a normal calculator. Type your PIN and press "=" to unlock the vault. Change the app icon to blend in even further. PANIC BUTTON One tap and everything disappears. Perfect when someone reaches for your phone. FACEDOWN LOCK Caught off guard? Place your phone face down and the vault closes instantly — lock the screen or jump straight to the calculator. BREAK-IN ALERTS (INTRUDER SELFIE) Wrong passcode? CAL silently snaps a photo of whoever tried and logs the time and location. Know exactly who has been snooping. SECRET PHOTO & VIDEO VAULT • Import photos, videos, audio, PDFs, Word docs — any file • Organize in private folders and albums • Built-in photo viewer and video player • Remove imported items from your camera roll PRIVATE BROWSER WITH AD BLOCKER • Blocks ads and trackers inside CAL's private browser • Faster, cleaner pages — no pop-ups, no pop-unders • No history, no cookies, no traces left when you close it • Download photos and videos straight into your vault MORE PRIVACY TOOLS • Password manager with secure notes • Hidden contacts • Private notes • Encrypted iCloud Backup & Sync — restore everything on a new device YOUR DATA STAYS YOURS Everything is encrypted on your device. CAL never sees your files, your passcode or your browsing. No accounts required. CAL PREMIUM Unlock unlimited storage, Decoy Vault, Break-In Alerts, ad-free private browsing and iCloud Backup. Weekly, monthly and yearly plans include a 3-day free trial. Lifetime plan available — pay once, own it forever. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Terms of Use: https://drive.google.com/file/d/1T3pVkOHm5yABRmrlu5RxcmgcrbnSDJ7f/view Privacy Policy: https://drive.google.com/file/d/11UGxOAPh3mL9wDY1iDQwqoC2XgWkiGEm/view Your secrets deserve a decoy. Download CAL.

Screenshots

Firefox Fast & Private Browser4 screens
CAL4 screens

Verdict

The call

The clearest difference is in-app purchases: Firefox Fast & Private Browser at none against CAL's 5. Firefox Fast & Private Browser also leads on ratings volume (219K vs 9) and chart position (#11 vs unranked). On price, rating, review sentiment and update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CAL sells 5 in-app purchases, starting at $1.99 per month. Firefox Fast & Private Browser asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Firefox Fast & Private Browser against 4.6 for CAL. That said, the two scores are not equally well evidenced: Firefox Fast & Private Browser has 219K ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 46% of Firefox Fast & Private Browser's written reviews are positive against 43% of CAL's.

UpkeepUpdate frequency

Firefox Fast & Private Browser ships an update weekly, CAL every 2 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 6 level
Firefox Fast & Private Browser versus CAL: the parameters behind the verdict, then further details
ParameterFirefox Fast & Private BrowserCAL
PriceFreeFree
Rating4.6 (219K ratings) — better4.6 (9 ratings)
Positive reviews45.7% of reviews — better42.9% of reviews
Number of ratings219K — better9
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank#11 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size369 MB32 MB
Age rating17+17+
DeveloperMozillaWiz Studio

Customer experience

Firefox Fast & Private Browser

All ratings218,800 ratings
Positive91.7%
Neutral3.1%
Negative5.2%
Written reviews3,095 reviews
Positive45.7%
Neutral11.0%
Negative43.3%

CAL

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews7 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

Bugs and requests

Firefox Fast & Private Browser

Reported bugs

4 issues
  • Images not loading properly
  • Incompatibility with certain websites and web apps
  • Keyboard issues and unexpected behavior when switching between apps
  • Sync issues and data loss when switching devices

Requested features

4 requests
  • Dark mode option
  • Improved bookmark management and organization
  • Built-in ad blocker or support for third-party ad blockers
  • Ability to rearrange tabs and customize the UI

CAL

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Firefox Fast & Private Browser

No in-app purchases

5 purchases

CAL

Subscriptions4
  • Premium$1.991 Month
  • Package Premium Monthly7 Days trial$2.991 Month
  • Premium Annually7 Days trial$19.491 Year
Show 1 more
  • Premium - Secret Data Annually$20.991 Year
One-time1
  • Package Premium Lifetime$30.99

Questions

Is Firefox Fast & Private Browser free?
Firefox Fast & Private Browser is free to download, with no in-app purchases.
Is CAL free?
CAL is free to download, with in-app purchases available.
Which has better reviews, Firefox Fast & Private Browser or CAL?
Firefox Fast & Private Browser is rated higher. Firefox Fast & Private Browser averages 4.6 out of 5 from 219K ratings, while CAL averages 4.6 from 9 ratings.
Do Firefox Fast & Private Browser or CAL have ads?
Neither Firefox Fast & Private Browser nor CAL shows ads.
Which is updated more often, Firefox Fast & Private Browser or CAL?
Firefox Fast & Private Browser ships an update weekly, and CAL every 2 weeks. Most recently, Firefox Fast & Private Browser was updated on October 28, 2026 and CAL on October 25, 2026.

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