Comparison

BYK Additive Guide vs PSSI

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

Head to head

Phase Separation Science, inc.

Free

💼 Business

No ratingsView app →

About

BYK Additive Guide

Features

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Discover the world of BYK additives with your Additive Guide App. This App is designed to provide you with the latest information on BYK’s additives portfolio. Access our completely updated product information, browse our additive recommendations by application, and find all the relevant product data at a glance. This App contains the languages German, English and Chinese.

About

PSSI

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Phase Separation Science is a NELAP accredited full service environmental laboratory located in Baltimore, Maryland specializing in expedited turnaround times. Under the same ownership since 1989, our management cadre and laboratory personnel collectively boast an unparalleled wealth of experience in the domain of quantitative analysis within instrumental chemistry. Our proficiency stands as a benchmark of excellence, reflecting decades of dedicated method refinement.

Screenshots

BYK Additive Guide4 screens

PSSI4 screens

Verdict

The call

The clearest difference is update cadence: PSSI at every 2 days against BYK Additive Guide's every 4 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BYK Additive Guide ships an update every 4 months, PSSI every 2 days. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.

Scorecard1 real difference · 5 level

BYK Additive Guide versus PSSI: the parameters behind the verdict, then further details
Parameter	BYK Additive Guide	PSSI
Price	Free	Free
Update frequency	Every 4 months	Every 2 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad	iPhone, iPad
Requires iOS	16.6 — better	17.0
Further details — not scored
Size	15 MB	135 MB
Age rating	4+	17+
Developer	BYK-Chemie GmbH	Evan Richardson

In-app purchases

None

BYK Additive Guide

No in-app purchases

None

PSSI

No in-app purchases

Questions

Is BYK Additive Guide free?

BYK Additive Guide is free to download, with no in-app purchases.

Is PSSI free?

PSSI is free to download, with no in-app purchases.

Do BYK Additive Guide or PSSI have ads?

Neither BYK Additive Guide nor PSSI shows ads.

Which is updated more often, BYK Additive Guide or PSSI?

BYK Additive Guide ships an update every 4 months, and PSSI every 2 days. Most recently, BYK Additive Guide was updated on September 10, 2026 and PSSI on September 25, 2026.