Comparison

TimeTree HD vs BidNote

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

Head to head
About

TimeTree HD

Explore the evolutionary timescale of life with this app. It provides a public knowledge base of divergence times among thousands of organisms, drawing from scientific literature. Easily search for comparisons between species and view summary statistics.

Highlights
  • Explore evolutionary timescale
  • Thousands of divergence times
  • Tree-based hierarchical system
  • Search for organism comparisons
  • Compute summary statistics
  • Data from 2,274 studies
Features
Read full description

TimeTree 4 is a public knowledge-base for information on the evolutionary timescale of life. This application allows easy exploration of the thousands of divergence times among organisms in the scientific literature. A tree-based (hierarchical) system is used to identify all published molecular time estimates bearing on the divergence of two chosen organisms, such as species, compute summary statistics, and present the results. Names of two taxa to be compared are entered in the search window and the results are presented on a set of self-explanatory tabs. TimeTree 4 contains data from 2,274 studies including 50,632 species. We will be adding more data in the future as it comes in from researchers. TimeTree 4 requires iOS 8.0 or newer. The TimeTree project is jointly directed by Blair Hedges (Center for Biodiversity, Temple University) and Sudhir Kumar (Institute for Genomics and Evolutionary Medicine, Temple University). This project has been supported, in part, by grants from the National Science Foundation, National Institutes of Health, NASA Astrobiology Institute, and Science Foundation of Arizona.

About

BidNote

This platform offers educational materials and tutoring services tailored to specific college courses. Educators can create and sell content or offer tutoring, earning commissions through PayPal Payouts. It aims to provide a more effective and curated learning experience.

Highlights
  • Course-specific educational materials
  • Handwritten and typed content
  • Video lessons
  • Asynchronous tutoring
  • Document scanning
  • PayPal/Venmo commission payouts
  • Content review for fraud prevention
Features
Read full description

BidNote is a platform that provides educational material and tutoring to individuals or groups of students. Once approved by our team, educators can provide course/content specific material and tutoring for free or a small price. And because BidNote is partnered with PayPal Payouts, educators can receive a daily commission payout from BidNote. No more scouring the internet for hours only to find help or lessons that aren't useful to a course you're taking. Find material and tutoring curated by people who actually took and know your course. Take the first step to a better educational experience and download BidNote. Features: - Handwritten/Typed material - Video lessons and content - Course specific content - Asynchronous tutoring - Updating material - PayPal/Venmo commission payouts - Document scanning - Download and access purchased material - Affordable pricing ($0.99-$20) - Manual review of all content posted (fraud/scam prevention) - One on one lessons and reviews - Detailed and well crafted content + help - And much more!

Screenshots

BidNote4 screens

Verdict

The call

The clearest difference is rating: BidNote at 4.8 against TimeTree HD's 1.0. BidNote also leads on review sentiment (100% vs 63%) and update cadence (weekly vs every 23 months). TimeTree HD's advantage is in-app purchases (none vs 10) and iOS requirement (8.0 vs 14.5). On price and ads 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. BidNote sells 10 one-off in-app purchases. TimeTree HD asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

BidNote holds the better App Store score, 4.8 against 1.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 63% of TimeTree HD's written reviews are positive against 100% of BidNote's.

UpkeepUpdate frequency

TimeTree HD ships an update every 23 months, BidNote weekly. The most recent releases landed on October 7, 2026 and September 28, 2026 respectively.

Scorecard8 real differences · 2 level
TimeTree HD versus BidNote: the parameters behind the verdict, then further details
ParameterTimeTree HDBidNote
PriceFreeFree
Rating1.0 (1 ratings)4.8 (4 ratings) — better
Positive reviews62.5% of reviews100.0% of reviews — better
Number of ratings14 — better
Update frequencyEvery 23 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS8.0 — better14.5
Further details — not scored
Size66 MB17 MB
Age rating4+12+
DeveloperArizona and Penn State UniversitiesGavin Wolfe

Customer experience

TimeTree HD

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

BidNote

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

TimeTree HD

No in-app purchases

10 purchases

BidNote

One-time10
  • Tier 2 Tutoring or Material$1.99
  • Tier 3 Tutoring or Material$2.99
  • Tier 4 Tutoring or Material$3.99
Show 7 more
  • Tier 5 Tutoring or Material$4.99
  • Tier 6 Tutoring or Material$5.99
  • Tier 8 Tutoring or Material$7.99
  • Tier 10 Tutoring or Material$9.99
  • Tier 13 Tutoring or Material$12.99
  • Tier 15 Tutoring or Material$14.99
  • Tier 20 Tutoring or Material$19.99

Questions

Is TimeTree HD free?
TimeTree HD is free to download, with no in-app purchases.
Is BidNote free?
BidNote is free to download, with in-app purchases available.
Which has better reviews, TimeTree HD or BidNote?
BidNote is rated higher. TimeTree HD averages 1.0 out of 5 from 1 ratings, while BidNote averages 4.8 from 4 ratings.
Do TimeTree HD or BidNote have ads?
Neither TimeTree HD nor BidNote shows ads.
Which is updated more often, TimeTree HD or BidNote?
TimeTree HD ships an update every 23 months, and BidNote weekly. Most recently, TimeTree HD was updated on October 7, 2026 and BidNote on September 28, 2026.

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