Comparison

References On Tap vs ZooMorphTrak

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

Head to head
About

References On Tap

This app helps you find, display, and import reference information and PDFs from various academic databases. Organize your references into groups, perform advanced searches, and sync your library across devices. It offers both a one-time purchase for core features and a subscription for cloud syncing.

Highlights
  • Search academic databases (arXiv, Google Scholar, PubMed, etc.)
  • Import reference information and PDFs
  • Organize references in static and smart groups
  • Advanced boolean and full-text search options
  • Sync libraries across iOS and macOS devices via iCloud
  • Share references for reading or import
Features
Read full description

••• Check out Bookends - References' big brother ••• References searches arXiv, Google Books, Google Scholar, JSTOR, the Library of Congress, PubMed, PubMed Central, and Semantic Scholar to find, display, and import reference information and pdfs of the full article (if you have access privileges). You can search your personal reference library, organize your references in groups (static and smart), and share references in a form suitable for reading or importing into desktop reference management applications. Many features are optimized for reference retrieval and management (advanced boolean searches, search for Full Text or Free Full text, recall recent searches, etc.). Use iCloud to sync all your libraries and attachments across iOS and macOS devices, and have full access to your references and sources when you're on the go. Standard, one-time purchase ($4.99): • No limit on searches or importing. Premium, yearly subscription ($4.99). Requires a Standard purchase. • Cloud sync with all your iOS and macOS devices. Subscription is for one year and can be auto-renewable. The subscription can be managed in iOS -> Settings > iTunes & App Store > Subscriptions. The subscription might renew if it wasn't canceled more than 24 hours before the renewal date. If the subscription is not renewed, Premium will be disabled. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ZooMorphTrak

Estimate and compare Bottlenose Dolphin bodyweight using simple measurements like length and girth. This tool is designed for animal care specialists in institutional settings, offering approximate weight calculations and comparisons to wild dolphin data.

Highlights
  • Estimate dolphin bodyweight
  • Compare managed vs. wild dolphin weights
  • Input sex, age, length, and girth
  • Avoids need for scales or trained cooperation
  • Derived from long-term dolphin studies
Read full description

Designed for institutional use by animal care specialists, ZooMorphTrak allows estimation and comparison functions for the bodyweight of Bottlenose Dolphins (Tursiops truncatus). The inputs to the calculations are the dolphin's sex, age (if known), length, and girth. Weight can be estimated from these measurements using a simple tape measure, and without requiring a scale nor to train the dolphin to cooperate with weight measurement. * The “Approximate” feature allows users to input measurements (sex, age, length and girth) and receive an approximate bodyweight. * The “Management” feature compares the bodyweight of a managed individual to the bodyweights of wild dolphins. The user enters the sex, age, length, and girth, and the measured weight. A comparison is made against reference ranges observed in wild dolphins. The prediction equations in this program were derived from long-term studies of dolphins both in the wild and in professional managed care.

Screenshots

References On Tap4 screens
ZooMorphTrak2 screens

Verdict

The call

The clearest difference is in-app purchases: ZooMorphTrak at none against References On Tap's 2. ZooMorphTrak also leads on rating (5.0 vs 4.7) and iOS requirement (9.0 vs 15.0). References On Tap's advantage is ratings volume (304 vs 1). On price, update cadence, ads 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. References On Tap sells 2 in-app purchases, starting at $4.99 per year. ZooMorphTrak asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ZooMorphTrak holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: References On Tap has 304 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

References On Tap ships an update every 2 months, ZooMorphTrak every 4 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
References On Tap versus ZooMorphTrak: the parameters behind the verdict, then further details
ParameterReferences On TapZooMorphTrak
PriceFreeFree
Rating4.7 (304 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings304 — better1
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size68 MB20 MB
Age rating4+4+
DeveloperReferencesOnTapChicago Zoological Society

Customer experience

References On Tap

All ratings304 ratings
Positive93.1%
Neutral4.9%
Negative2.0%
Written reviews12 reviews
Positive50.0%
Neutral8.3%
Negative41.7%

ZooMorphTrak

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

In-app purchases

2 purchases

References On Tap

Subscriptions1
  • Premium$4.991 Year
One-time1
  • Standard$4.99
None

ZooMorphTrak

No in-app purchases

Questions

Is References On Tap free?
References On Tap is free to download, with in-app purchases available.
Is ZooMorphTrak free?
ZooMorphTrak is free to download, with no in-app purchases.
Which has better reviews, References On Tap or ZooMorphTrak?
ZooMorphTrak is rated higher. References On Tap averages 4.7 out of 5 from 304 ratings, while ZooMorphTrak averages 5.0 from 1 ratings.
Do References On Tap or ZooMorphTrak have ads?
Neither References On Tap nor ZooMorphTrak shows ads.
Which is updated more often, References On Tap or ZooMorphTrak?
References On Tap ships an update every 2 months, and ZooMorphTrak every 4 months. Most recently, References On Tap was updated on November 2, 2026 and ZooMorphTrak on November 3, 2026.

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