Comparison

SD401 vs CDR Pro

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

Head to head
About

SD401

Features
Read full description

SD401 is a quality control system. The SD401 system consists of an iPhone with SD401 app and external SH7 Reader hardware (purchased separately). The SD401 app provides the GUI for displaying data. Data is received via Bluetooth communications from the SH7 Reader. Displayed data is in numeric form with the addition of alarm β€œLEDS” for each data point. The number of displayed data points is configured via a setup screen, with password control. Also, the alarm LEDS are configured with limits set for each data point. A data value within limits will be shown with a β€œgreen” LED and value outside limits with a β€œred” LED. Additional SH7 Reader readings such as temperature and battery voltage can be displayed in the app.

About

CDR Pro

Features
Read full description

With help of the CDR Pro app, customers can easily search for shipments on aircargobook.com and create them if needed. Your warehouse staff can manage shipments and add information and documentation for any kind of issue. Photos and customised questionaires paired with a connection to our plattform allow to share live information with your customers and your accounting department wherevery they are.

Screenshots

SD4012 screens
CDR Pro4 screens

Verdict

The call

The clearest difference is update cadence: CDR Pro at monthly against SD401's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

SD401 ships an update every 5 months, CDR Pro monthly. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

Scorecard1 real difference Β· 5 level
SD401 versus CDR Pro: the parameters behind the verdict, then further details
ParameterSD401CDR Pro
PriceFreeFree
Update frequencyEvery 5 monthsMonthly β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod β€” better
Requires iOS15.5 β€” better15.6
Further details β€” not scored
Size25 MB47 MB
Age rating4+4+
DeveloperOwen Brownaircargobook GmbH

In-app purchases

None

SD401

No in-app purchases

None

CDR Pro

No in-app purchases

Questions

Is SD401 free?
SD401 is free to download, with no in-app purchases.
Is CDR Pro free?
CDR Pro is free to download, with no in-app purchases.
Do SD401 or CDR Pro have ads?
Neither SD401 nor CDR Pro shows ads.
Which is updated more often, SD401 or CDR Pro?
SD401 ships an update every 5 months, and CDR Pro monthly. Most recently, SD401 was updated on October 9, 2026 and CDR Pro on October 2, 2026.

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