Comparison

Flatness vs GYDEbook

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

Head to head
About

Flatness

This app facilitates precise rectangular flatness measurements for applications like motor and pump foundations. It guides users through the entire measurement and alignment process when connected to an AT-400 Ultimate with an M9 sensor via Bluetooth. Generate instant PDF reports of your findings directly on-site.

Highlights
  • Bluetooth connectivity
  • Icon-based adaptive user interface
  • 3D result views
  • Instant PDF report generation
  • Guided measurement process
Features
Read full description

This is a companion app for performing rectangular flatness measurements, using the AT-400, on typical applications such as a motor and pump foundations. The app guides the user throughout the complete measurement and alignment process when using the Bluetooth® connected ACOEM M9 sensor. This offers an extensive easy to use flatness measurement capability. The PDF Report function provides a fast on-site reporting capability by converting saved measurement reports into PDF files. ---- Note: This app works only with the ACOEM AT-400 Ultimate with the M9 sensor ---- Key Features: - Connected using Bluetooth® - GuideU: Our patented icon-based and color-coded adaptive user interface - New 3D views of the result - Create an instant PDF-report Visit the website www.acoem.com for more information on alignment in general, the ACOEM tools and support of the app.

About

GYDEbook

Organize personal, financial, and beneficiary details in one secure location. This tool simplifies legacy planning, offering peace of mind and easy information sharing with loved ones or executors. Securely document estate details and export information instantly.

Highlights
  • Organize personal, financial, and beneficiary information
  • Secure documentation of estate and beneficiary details
  • Email-verified login for account protection
  • Instant PDF export
  • Subscription support via Apple Pay
  • Seamless iPhone and iPad compatibility
Features
Read full description

Version 1.2 GYDEbook helps you organize your personal, financial, and beneficiary information in one secure place — designed for peace of mind and easy sharing with family or executors. What’s New     •    Secure, east way to documenting estate and beneficiary details     •    Clean, simple design for capturing personal and financial notes     •    Email-verified login for account protection     •    Instant PDF export for printing or safekeeping     •    Subscription support via Apple Pay     •    Works seamlessly across iPhone and iPad Why You’ll Love It GYDEbook makes end-of-life and legacy planning less overwhelming. It’s the safe, private place to organize everything that matters — so your loved ones have clarity when it’s needed most. Built with care by CWSP LLC. Your story. Your guidance. Your GYDEbook

Screenshots

Flatness4 screens
GYDEbook4 screens

Verdict

The call

The clearest difference is price: Flatness at Free against GYDEbook's $0.99. Flatness also leads on iOS requirement (12.0 vs 14.0). GYDEbook's advantage is update cadence (every 4 days vs every 16 months). On rating, ratings volume, ads and in-app purchases 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

Flatness is free to download; GYDEbook costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Flatness against 5.0 for GYDEbook. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Flatness ships an update every 16 months, GYDEbook every 4 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
Flatness versus GYDEbook: the parameters behind the verdict, then further details
ParameterFlatnessGYDEbook
PriceFree — better$0.99
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 16 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size61 MB34 MB
Age rating4+17+
DeveloperACOEM GroupCWSP LLC

Customer experience

Flatness

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

GYDEbook

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Flatness

No in-app purchases

None

GYDEbook

No in-app purchases

Questions

Is Flatness free?
Flatness is free to download, with no in-app purchases.
Is GYDEbook free?
GYDEbook costs $0.99, with no in-app purchases.
Which has better reviews, Flatness or GYDEbook?
Flatness and GYDEbook are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Flatness or GYDEbook have ads?
Neither Flatness nor GYDEbook shows ads.
Which is updated more often, Flatness or GYDEbook?
Flatness ships an update every 16 months, and GYDEbook every 4 days. Most recently, Flatness was updated on October 17, 2026 and GYDEbook on October 7, 2026.

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