Comparison

Mailinblack vs F4.0 LDC

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

Head to head
About

Mailinblack

Read full description

Your passwords and email, together on mobile Your data deserves protection that is simple, comprehensive, and always within reach. That is why My Sikker and My Protect are now available in the Mailinblack mobile app: your password manager and protected email, wherever you are. My Sikker supports you every day and gives you peace of mind. Mailinblack makes strong passwords the standard for all your needs. Every password is securely protected yet instantly accessible through a simple, intuitive interface that never compromises your security. My Protect gives you control over your email directly from your phone: review quarantined emails, take action in seconds, and manage your approved or blocked senders wherever you are. With the Mailinblack mobile app, your passwords and email are always within reach, so you remain in control of your security wherever you are, at any time. To use the mobile app, you must have a Mailinblack professional licence. Don’t have a licence? Discover Mailinblack: https://www.mailinblack.com/demo/

About

F4.0 LDC

Features
Read full description

Formulaire 4.0 LDC simplifie la collecte de données avec une interface utilisateur intuitive. Remplissez des formulaires en toute simplicité en saisissant du texte, en sélectionnant des dates, en sélectionnant des images, en prenant des photos depuis l'appareil photo, en répondant à des QCM.

Screenshots

Mailinblack4 screens
F4.0 LDC3 screens

Verdict

The call

The clearest difference is update cadence: Mailinblack at every 3 weeks against F4.0 LDC's every 4 months. F4.0 LDC's advantage is iOS requirement (16.0 vs 18.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Mailinblack ships an update every 3 weeks, F4.0 LDC every 4 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 4 level
Mailinblack versus F4.0 LDC: the parameters behind the verdict, then further details
ParameterMailinblackF4.0 LDC
PriceFreeFree
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size99 MB35 MB
Age rating17+4+
DeveloperMailinblackAltitude Cherbourg

In-app purchases

None

Mailinblack

No in-app purchases

None

F4.0 LDC

No in-app purchases

Questions

Is Mailinblack free?
Mailinblack is free to download, with no in-app purchases.
Is F4.0 LDC free?
F4.0 LDC is free to download, with no in-app purchases.
Do Mailinblack or F4.0 LDC have ads?
Neither Mailinblack nor F4.0 LDC shows ads.
Which is updated more often, Mailinblack or F4.0 LDC?
Mailinblack ships an update every 3 weeks, and F4.0 LDC every 4 months. Most recently, Mailinblack was updated on November 3, 2026 and F4.0 LDC on October 30, 2026.

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