Comparison

Litt's Drug Eruption Database vs GRAPPA App

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

Head to head
About

Litt's Drug Eruption Database

Features
Read full description

This unique resource allows the search of profiles for thousands of generic and trade name drugs, while also providing over 125,000 references that link directly to PubMed, enabling better diagnose and treatment of patients. Reliable, international sources are used to regularly update the database with the latest developments in the field. This means that multiple new drugs and hundreds of new references are added each month, allowing you to benefit from up-to-date, accurate information that keeps you at the very forefront of your field. Supported by thousands of peer reviewed references linking out to PubMed and containing anecdotal observed evidence, this database can dramatically expand your knowledge of your field. In addition, this easy-to-use website gives you varying search options to ensure you get the information you want as quickly as possible. Each drug profile will provide you with a wealth of essential information, including: -- Synonyms -- Trade names -- Pharmaceutical company/companies -- Indications -- Category -- Half-life -- Drug-drug interactions -- Adverse reactions This resource covers adverse reactions from all angles with information on skin, hair, nails, mucosal, cardiovascular, central nervous system, neuromuscular/skeletal, respiratory, gastrointestinal, endocrine/metabolic, hematologic, renal, genitourinary, otic, ocular, local and other. It identifies potentially hazardous drug-drug interactions, making it a resource that not only meets your needs as a busy physician but also one which, once you have tried it, you simply cannot live without. The database was originated by Jerome Z. Litt from his annual Drug Eruptions and Reactions Manuals; it is now edited by Neil H. Shear, with the participation of Jerome Z. Litt.

About

GRAPPA App

This medical application aids in the assessment of patients with psoriatic arthritis and psoriasis. It provides tools to calculate disease severity scores and includes patient-completed questionnaires in multiple languages. Access to GRAPPA resources is also available.

Highlights
  • Psoriatic arthritis and psoriasis assessment
  • Disease severity calculators (MDA, PASI, BSA)
  • Patient-completed questionnaires (PsAID, PEST, HAQ)
  • Multilingual questionnaire support
  • Access to GRAPPA resources
Features
Read full description

This app from GRAPPA (Group for Research and Assessment of Psoriasis and Psoriatic Arthritis) is designed to support the assessment of patients with psoriatic arthritis and psoriasis. It allows users to calculate a patient’s MDA and assess skin disease (using either PASI or BSA) through specially designed calculators. The app also includes PsAID, PEST and HAQ questionnaires which can be completed directly by patients in a range of languages and a selection of slides from the GRAPPA resources. Visit http://www.grappanetwork.org/ to find out more about GRAPPA.

Screenshots

Litt's Drug Eruption Database4 screens
GRAPPA App4 screens

Verdict

The call

The clearest difference is iOS requirement: Litt's Drug Eruption Database at 9.3 against GRAPPA App's 13.0. On price, update cadence, 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

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

UpkeepUpdate frequency

Litt's Drug Eruption Database ships an update every 4 months, GRAPPA App every 3 months. The most recent releases landed on October 26, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 8 level
Litt's Drug Eruption Database versus GRAPPA App: the parameters behind the verdict, then further details
ParameterLitt's Drug Eruption DatabaseGRAPPA App
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.3 — better13.0
Further details — not scored
Size17 MB64 MB
Age rating17+17+
DeveloperAMADataSet LimitedGroup for Research and Assessment of Psoriasis and Psoriatic Arthritis

In-app purchases

None

Litt's Drug Eruption Database

No in-app purchases

None

GRAPPA App

No in-app purchases

Questions

Is Litt's Drug Eruption Database free?
Litt's Drug Eruption Database is free to download, with no in-app purchases.
Is GRAPPA App free?
GRAPPA App is free to download, with no in-app purchases.
Do Litt's Drug Eruption Database or GRAPPA App have ads?
Neither Litt's Drug Eruption Database nor GRAPPA App shows ads.
Which is updated more often, Litt's Drug Eruption Database or GRAPPA App?
Litt's Drug Eruption Database ships an update every 4 months, and GRAPPA App every 3 months. Most recently, Litt's Drug Eruption Database was updated on October 26, 2026 and GRAPPA App on October 8, 2026.

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