Comparison

mechanical design engine vs Digital_Diary

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

Head to head
About

mechanical design engine

Features
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* To calculate basic thickness of cylindrical/rectangular pressure vessel including heads if input data such as pressure, temperature, inner diameter and material information. * flange data can be easily searched. * Profile steel information such as pipe, H, W, I and U-Beam. * Raw material information, that is chemical composition and mechanical properties, for example, ASTM A240 316L, EN10297-1, SUS316L and so on. * Size and shape information of every thread(iso/unf/pf/pt) and shackles(bow/d-type) * To calculate force and moment of solid mechanics according to support type.

About

Digital_Diary

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Background National Board RCI-1 / NB-263 requires that each Repair Inspector and Authorized Inspector performing Codes duties shall maintain an Inspector Diary and monitor the Certificate Holder's quality program on a continual basis. The purpose of the diary is to provide a record of the Inspector's activity and to support continuity of inspections. The inspector diary shall be available at the location of inspection and must be maintained for a minimum of 5 years. ย  Most of the AIA are maintaining hardbound diaries at site, however handling and retrieving those bound dairies are bit challenge and with Covid-19 outbreak it become trickier to physically handling hard bound diaries. ย  Both ASME and NB allows electronic diaries however the requirement it must be under the complete administrative control of the AIA and secured in such a way as to prevent revisions, additions, or deletions to entries which have been previously logged in the diary. ย  Utility This application addresses all those requirements, user inputs are transferred to a PDF form which is locked and cannot be altered later. These PDF inspection report can be sent via email to administrator and can be stored in company own cloud storage and can be accessed remotely from anywhere. Not only report can store indefinitely but also available for auditing purpose making life easy for all. ย  Data entry can be made by writing in the application or by speech to text (transcription) making it easy for those who are not good with typing or slow to write, hence making it quick data entry possible for people of all ages. ย  ย  Competitive Edge There is no such app available in the market to facilitate and meet all the requirement of the regulator and ease of use. ย  Target Audience This app targets inspection agencies, pressure items manufacturing organizations, quality control personnel and other organization that requires to maintain their records. ย  Customization This app can be customized to your format and data requirement and can only be available within your company. If you want to customize this app to fits your need or any other application development, contact us at paramountengineeringincorp@gmail.com Hardware Access User to provide access to Camera for picture taken from Camera or library and attached to inspection report, microphone for transcription and internet access to send the report via email. No data is collected by anyone. User can safe their data on their own server / cloud Subscription Requirement: This is paid application, you can download the app from App Store for free however monthly or annual subscription is need before you can use any of the function of this app. Purchase can be made by going to the menu of the application. Terms and condition are also provided there. Terms of Use: This app follow Apple Standard Term of Use (EULA) more information about apple standard Licensed Application End User License Agreement can be found at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

mechanical design engine4 screens
Digital_Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: mechanical design engine at none against Digital_Diary's 2. Digital_Diary's advantage is update cadence (every 2 days vs every 2 months) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Digital_Diary sells 2 in-app purchases, starting at $19.99 per month. mechanical design engine asks for nothing beyond the download.

UpkeepUpdate frequency

mechanical design engine ships an update every 2 months, Digital_Diary every 2 days. The most recent releases landed on September 25, 2026 and September 23, 2026 respectively.

Scorecard3 real differences ยท 3 level
mechanical design engine versus Digital_Diary: the parameters behind the verdict, then further details
Parametermechanical design engineDigital_Diary
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPodiPhone, iPad, iPod, Mac โ€” better
Requires iOS13.013.0
Further details โ€” not scored
Size63 MB3 MB
Age rating4+4+
Developergan dae choiShabbir Ahmed

In-app purchases

None

mechanical design engine

No in-app purchases

2 purchases

Digital_Diary

Subscriptions2
  • Monthly Auto-Renewing Subs$19.991 Month
  • Annual Auto-Renewing Subs$24.991 Year

Questions

Is mechanical design engine free?
mechanical design engine is free to download, with no in-app purchases.
Is Digital_Diary free?
Digital_Diary is free to download, with in-app purchases available.
Do mechanical design engine or Digital_Diary have ads?
Neither mechanical design engine nor Digital_Diary shows ads.
Which is updated more often, mechanical design engine or Digital_Diary?
mechanical design engine ships an update every 2 months, and Digital_Diary every 2 days. Most recently, mechanical design engine was updated on September 25, 2026 and Digital_Diary on September 23, 2026.

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