Diary with Fingerprint Lock

Review by eFreeware

Diary with Fingerprint Lock is a journaling app from AutoTazk Labs, published in the Lifestyle category on Google Play. It is free to download and has been installed more than five million times, which suggests a large audience already treats it as a daily writing tool. The app is built around a simple promise: a private place to record thoughts, protected by a fingerprint or password rather than left open to anyone who picks up your phone.

The main reason to consider it is the combination of that lock and a fairly broad set of journaling features. Instead of a bare text box, the app brings together mood tracking, customizable themes, templates for reflection, photo and voice additions, and syncing between devices. For someone who has tried to keep a journal in a notes app and found it either too exposed or too plain, that mix is the appeal.

It carries a 4.7 average from nearly fifty thousand ratings, which is a strong signal for a free app in this category. That said, it contains ads and offers in-app purchases, so the experience is not entirely without cost or interruption. I will go through what the app does, what it asks of you, and who it makes the most sense for.

A locked journal that stays on your terms

At its core, this is a diary you can lock. Opening the app requires the same kind of authentication you already use for your phone, so a borrowed device does not mean a borrowed diary.

Entries themselves are not limited to plain text. You can combine writing with images and emotions, which turns a page into something closer to a scrapbook than a logbook. The app also supports voice notes and location tags, so a single entry can carry a photo, a recorded thought and the place it was written. For travel journaling or memory keeping, that combination covers more ground than a text-only diary.

There is also a mini diary mode intended for quick thoughts when you do not want to sit down and write at length. The developer frames it as on-the-go journaling and life logging, which suggests short entries that take seconds rather than minutes. That fits the way many people actually use a journal: a sentence here, a mood there, rather than a long nightly ritual.

Mood tracking, reminders and reflection tools

Mood tracking is one of the more developed parts of the app. The developer describes a daily mood tracking diary with reminders, plus a mood tracker to monitor your emotional journey over time. The reminders are the practical piece here: a journaling habit is easy to start and easy to drop, and a nudge at a set time is a common way apps try to keep people coming back.

Beyond moods, the app includes goals and progress tracking under the banner of self-reflection. There are templates for guided self-reflection and mindfulness journaling, which give you a structure to write into rather than a blank page. The developer also presents the app as usable for gratitude journaling, stress relief and personal growth, which are all variations on the same idea: writing with a little direction.

Whether you want that structure is a personal preference. Some people find templates help them get started; others prefer to write freely and ignore prompts entirely. Because the templates are described as one option among several, there is room to use the app either way.

Themes, sharing and syncing between devices

Personalization is a clear focus. The app includes customizable journal themes and backgrounds, including a pink-themed interface option. That detail, along with the app's own summary describing it as a diary for girls, tells you the visual design leans toward a softer, more decorative look than a plain productivity tool. If you like choosing a theme and making the journal feel like yours, this is where that happens.

Sharing is handled selectively. Entries can be shared with chosen people or kept completely private, so the lock does not have to be all or nothing. You can treat the diary as a sealed space and still send a specific entry to someone when it makes sense.

Multi-device sync is also listed, so entries can follow you between devices rather than living on one phone. For anyone who writes on a phone and wants to read or add to the same journal elsewhere, that is a meaningful convenience. It also means the app is not purely a single-device vault, which is worth knowing if you move between hardware regularly.

Exporting, photos and the practical extras

The app supports exporting entries for safekeeping or printing, which addresses a common worry with digital diaries: what happens to years of writing if you stop using the app. Being able to pull entries out gives you a copy you control, and printing is an option the developer explicitly mentions.

Photos are integrated as part of the writing experience rather than as an afterthought, in what amounts to a photo diary. Combined with voice notes and location tags, this makes the app suitable for recording trips, events or everyday moments that are easier to capture with an image than a paragraph. The result is a journal that can be as visual as you want it to be.

The app was released on November 1, 2023, and the most recent update only fixes defects. That tells you the developer is still touching the app, though the update itself is not feature-focused. For a free app with this many installs, ongoing maintenance is a reasonable expectation.

What the free download involves

The app is free to download and contains ads. It also offers in-app purchases. If you are considering it, the sensible approach is to treat the free download as the starting point and see how the app fits your routine before deciding whether to spend anything.

The security model is also something to think about practically. Fingerprint and password protection keep casual eyes out, but they depend on you actually setting them up and remembering the password. A locked diary is only as private as the lock you configure, so it is worth taking that step seriously rather than skipping it during setup.

Syncing between devices is a listed feature, so if you want entries to appear on more than one device, that is the part of the app to look at first.

Who this diary is built for

This app is aimed at people who want to write regularly and care about privacy. The fingerprint lock, the hidden lock option and the ability to share selectively all point to an audience that treats a journal as personal and wants control over who sees it. If you have avoided digital journaling because a notes app felt too exposed, the lock is the feature that changes that calculation.

The mood tracking, reminders and reflection templates suit someone who wants journaling to do a little more than store text. If you are interested in tracking how you feel over time, or in having prompts to write against, those tools are the reason to pick this over a plain document. The themes and pink interface option add a lighter, more personal layer on top.

The photo, voice note and location features widen the appeal to memory keepers and travelers who want entries that carry more than words. Between the mini diary for quick notes and the fuller entry options, the app can scale from a one-line daily check-in to a detailed, illustrated record. It is a broad tool, and the free download with ads and purchases is the trade-off that comes with that breadth.

A private journal worth trying if the lock matters to you

Diary with Fingerprint Lock does one thing clearly and several things competently. The lock is the centerpiece, and the surrounding features, mood tracking, templates, themes, photos, voice notes, sync and export, make it a fuller journaling tool than the name alone suggests. With more than five million installs and a 4.7 average from a large number of ratings, it has clearly found an audience that keeps using it.

The caveats are straightforward. It is free but ad-supported, and it offers in-app purchases. The security depends on you configuring and remembering your lock. And the app leans toward a decorative, personal style, which will appeal to some more than others.

If you want a private, customizable place to write, track your mood and keep memories with photos and notes, this is a reasonable app to install and try. If you mainly need a bare text journal and nothing else, the extra features are unlikely to matter to you. For everyone in between, the free download makes it easy to find out which camp you are in.

What's new in version 8.5

Defect fixing.