Comparison

Lock Notes vs Decision Logic

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

Head to head
About

Lock Notes

Securely store private thoughts, passwords, and reminders with biometric authentication. Enjoy a simple, elegant interface with iCloud sync, customizable themes, and backup options. Your data remains private and encrypted.

Highlights
  • Biometric authentication (Face ID, Touch ID)
  • Encrypted note storage
  • iCloud sync across devices
  • Customizable themes and dark mode
  • Backup and restore functionality
  • Ad-free minimalist interface
Features
Read full description

Keep your secrets safe. Secret Notes is the most secure and elegant way to store private thoughts, passwords, ideas, and personal reminders — all protected with Face ID, Touch ID, or a passcode. Why Secret Notes? • Secure your privacy Your notes are encrypted and protected with biometric authentication. Only you have access. • Simple and elegant No ads, no distractions. Just a beautiful, minimalist notepad with powerful features. • iCloud Sync Access your notes across all your iOS devices. Changes are synced automatically and securely. • Dark mode and themes Comfort for your eyes, day and night. Choose the style that fits your mood. • Backup and restore Never lose a note. Backup your data and restore it in seconds. Perfect for: • Personal journals • Sensitive work notes • Password hints • Private to-dos • Anything you want to keep hidden Your privacy is our priority. We don’t collect any personal data, and everything stays on your device or iCloud. Write freely. Store safely. Stay private. Information about the auto-renewable nature of the subscription - The price of the subscription is $1.99 per month or $9.99 per year. Every month/year your subscription is auto-renewed. - Subscription automatically renews if automatic renewal is not turned off at least 24 hours before the end of the current period - Charging for renewal of subscription takes place within 24 hours before the end of the current period. - After the end of the trial period, the monthly subscription will begin with the price accepted in your country - Update, manage and unsubscribe according to Apple's rules in your iTunes account settings - You can cancel your subscription via this URL​: https://support.apple.com/en-us/HT202039 - Privacy Policy: https://lykovstudio.io/privacy - Terms of Use: https://lykovstudio.io/terms

About

Decision Logic

This app helps you make better decisions by comparing multiple options based on your priorities. It guides you through a structured process to evaluate choices, avoid regret, and feel confident in your selections.

Highlights
  • Step-by-step decision guidance
  • Compare multiple options
  • Define and rate decision factors
  • Visual breakdown of pros and cons
  • Save and revisit past decisions
  • Avoid impulse choices
Features
Read full description

Make smarter choices and better decisions. Avoid regret. Feel confident. Facing a tough decision? Can’t decide which option is best? Whether you’re choosing a car, picking a school, buying a house, or planning a vacation — Michi helps you think clearly, compare wisely, and choose confidently. Unlike a coin flip, wheel spinner, or random picker app, Michi doesn’t leave important choices up to chance. It’s better than a coin toss because it actually helps you evaluate your options so you can decide now with clarity, not luck. What is Michi? Michi is your personal decision making assistant. It guides you step-by-step through comparing multiple options using the factors that matter most to you. In just minutes, you’ll have a clear breakdown of which option best fits your needs and why. Michi is great for decisions like: -Choosing between homes, apartments, or cities -Deciding on a car, laptop, or phone -Comparing job offers or career paths -Selecting the right school, course, or training program -Planning your next vacation -Evaluating service providers or subscriptions How It Works -Name your decision – e.g., “Which car should I buy?” -Define your factors – What matters most (Price, Features, Reliability, etc.) -Add your options – e.g., Car A, Car B, Car C -Rate each option – Based on how they stack up against your priorities -See your results – Michi calculates which option fits best, with a clear visual breakdown of pros and cons Pro Subscription Required Michi offers a free trial so you can explore all features before purchasing. After the trial, a Lifetime Michi Pro purchase is required to continue using the app. Choose the plan that works best for you: Free Trial (One Full Decisions): Analyze one free decision, then will need Lifetime Pro. Lifetime Pro: $1.99 What’s Included in Michi Pro -Unlimited decision projects -Unlimited options per project -Save and revisit past decisions -Full visual comparison breakdowns Why Choose Michi Pro? -Avoid impulse decisions -Feel confident knowing you considered what really matters -Get organized and stop overthinking -Make progress instead of staying stuck in indecision With Michi, you’ll never have to rely on a random spinner, wheel, or coin flip again. Instead, you’ll have a structured way to compare, evaluate, and choose the option that’s truly best for you. By downloading or using Michi, you agree to the Apple Standard End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Lock Notes4 screens
Decision Logic4 screens

Verdict

The call

The clearest difference is monetization model: Decision Logic at free with in-app purchases against Lock Notes's subscription. Decision Logic also leads on review sentiment (80% vs 57%). Lock Notes's advantage is ads (none vs shown) and rating (4.4 vs 4.1). On price, in-app purchases, device support and iOS requirement 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. Lock Notes sells 7 in-app purchases, starting at $4.99 per 7 days and Decision Logic sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Lock Notes holds the better App Store score, 4.4 against 4.1. That said, the two scores are not equally well evidenced: Lock Notes has 137 ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 57% of Lock Notes's written reviews are positive against 80% of Decision Logic's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Lock Notes ships an update every 10 days, Decision Logic every 3 weeks. The most recent releases landed on September 22, 2026 and July 4, 2026 respectively.

Scorecard6 real differences · 4 level
Lock Notes versus Decision Logic: the parameters behind the verdict, then further details
ParameterLock NotesDecision Logic
PriceFreeFree
Rating4.4 (137 ratings) — better4.1 (12 ratings)
Positive reviews56.5% of reviews80.0% of reviews — better
Number of ratings137 — better12
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0.0 — better
Further details — not scored
Size15 MB75 MB
Age rating4+4+
DeveloperLYKOV STUDIO LTDSoutheast Adventures LLC

Customer experience

Lock Notes

All ratings137 ratings
Positive83.2%
Neutral4.4%
Negative12.4%
Written reviews46 reviews
Positive56.5%
Neutral0.0%
Negative43.5%

Decision Logic

All ratings12 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews10 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

7 purchases

Lock Notes

Subscriptions5
  • Weekly$4.997 Days
  • Weekly3 Days trial$4.997 Days
  • Monthly$7.991 Month
Show 2 more
  • Annual$29.991 Year
  • Annual3 Days trial$29.991 Year
One-time2
  • Disable ads$0.99
  • Lifetime$39.99
2 purchases

Decision Logic

Subscriptions1
  • Weekly Pro Plan3 Days trial$1.997 Days
One-time1
  • Lifetime Pro Access$1.99

Questions

Is Lock Notes free?
Lock Notes is free to download, with in-app purchases available.
Is Decision Logic free?
Decision Logic is free to download, with in-app purchases available.
Which has better reviews, Lock Notes or Decision Logic?
Lock Notes is rated higher. Lock Notes averages 4.4 out of 5 from 137 ratings, while Decision Logic averages 4.1 from 12 ratings.
Do Lock Notes or Decision Logic have ads?
Decision Logic shows ads; Lock Notes does not.
Which is updated more often, Lock Notes or Decision Logic?
Lock Notes ships an update every 10 days, and Decision Logic every 3 weeks. Most recently, Lock Notes was updated on September 22, 2026 and Decision Logic on July 4, 2026.

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