Comparison

Nielsen Mobile App vs Pendulum

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

Head to head
About

Nielsen Mobile App

This app allows individuals participating in Nielsen's media research to contribute to understanding internet and mobile device usage. By installing the app, users help measure the digital landscape and can earn rewards for their participation. An invitation and prior registration are required to use its features.

Highlights
  • Media consumption measurement
  • Digital landscape analysis
  • Mobile device usage tracking
  • Earn rewards for participation
  • Anonymized and aggregated data
Features
Read full description

Nielsen is a global leader in measuring media consumption. The Nielsen App is for individuals who are participating in Nielsen's media research. If you have already joined one of Nielsen's panels (Digital, TV/streaming, Radio) and have been invited to use the app, please continue with downloading the app. Specifically, for panelists in our Digital Panel - participation helps us understand how consumers use the internet and their mobile devices by studying the types of websites and apps people like you use. By installing our app on your smartphone or tablet, you’re contributing to the measurement of the digital landscape and are eligible to earn rewards. Your mobile activity will be anonymized and aggregated along with thousands of other participating panelists before any reports are shared. Before downloading our Nielsen Mobile App, you must first sign up using our registration form (if you were directly invited to participate, use the provided information to register your account). Once your registration is submitted, you can download this app to your smartphone or tablet. If you haven’t completed our registration form, this app will not function and you won’t receive rewards. In addition, if you weren’t directly invited to participate or did not already register, you can sign up online for the Nielsen Computer and Mobile Panel. You can access our Privacy Policy here: https://www.nielsen.com/legal/nielsen-panel-app-privacy-notice/ If you have any questions, follow this link to contact our support team.

About

Pendulum

This app helps you manage your pen pal relationships by tracking correspondence. Record when you send and receive letters, note writing materials, and set reminders to stay in touch. Sync your data across devices for seamless management.

Highlights
  • Track sent and received letters
  • Record pen, ink, and paper used
  • Set reminders to write and post
  • Monitor letter delivery times
  • iCloud sync across devices
Read full description

Pendulum - keep track of your pen pals! • Add your friends, record when you send them letters or they send something to you. See how long it takes for your letters to arrive! • Record what pen, ink, and paper you used to write to each person, to keep the variety going each time you write. • Reminders to write back, or to post letters you've written but have sat by the front door for ages; you won't forget to stay in touch again. • Sync via iCloud, so you can keep up to date regardless of what device you have to hand.

Screenshots

Nielsen Mobile App4 screens
Pendulum4 screens

Verdict

The call

The clearest difference is in-app purchases: Nielsen Mobile App at none against Pendulum's 5. Nielsen Mobile App also leads on ratings volume (539 vs 16) and iOS requirement (12.0 vs 17.0). Pendulum's advantage is update cadence (every 9 days vs every 4 months). On price, rating, review sentiment 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. Pendulum sells 5 one-off in-app purchases. Nielsen Mobile App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.1 for Nielsen Mobile App against 4.2 for Pendulum. That said, the two scores are not equally well evidenced: Nielsen Mobile App has 539 ratings behind it against 16, so its average is the more settled of the two. Written reviews split almost evenly too, at 66% and 67% positive.

UpkeepUpdate frequency

Nielsen Mobile App ships an update every 4 months, Pendulum every 9 days. The most recent releases landed on September 20, 2026 and September 10, 2026 respectively.

Scorecard5 real differences · 5 level
Nielsen Mobile App versus Pendulum: the parameters behind the verdict, then further details
ParameterNielsen Mobile AppPendulum
PriceFreeFree
Rating4.1 (539 ratings)4.2 (16 ratings) — better
Positive reviews66.2% of reviews66.7% of reviews — better
Number of ratings539 — better16
Update frequencyEvery 4 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size75 MB5 MB
Age rating4+4+
DeveloperThe Nielsen CompanyBenjamin Cardy

Customer experience

Nielsen Mobile App

All ratings539 ratings
Positive77.9%
Neutral5.0%
Negative17.1%
Written reviews517 reviews
Positive66.2%
Neutral5.0%
Negative28.8%

Pendulum

All ratings16 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

Bugs and requests

Nielsen Mobile App

Reported bugs

3 issues
  • Inability to register/log in
  • App causing internet connectivity issues
  • Points disappearing without explanation

Requested features

4 requests
  • More opportunities to earn points
  • Improved customer support
  • Streamlined interface
  • Ability to track points balance in-app

Pendulum

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Nielsen Mobile App

No in-app purchases

5 purchases

Pendulum

One-time5
  • Extra Fine Tip$0.99
  • Fine Tip$1.99
  • Medium Tip$3.99
Show 2 more
  • Broad Tip$5.99
  • Stub Tip$9.99

Questions

Is Nielsen Mobile App free?
Nielsen Mobile App is free to download, with no in-app purchases.
Is Pendulum free?
Pendulum is free to download, with in-app purchases available.
Which has better reviews, Nielsen Mobile App or Pendulum?
Pendulum is rated higher. Nielsen Mobile App averages 4.1 out of 5 from 539 ratings, while Pendulum averages 4.2 from 16 ratings.
Do Nielsen Mobile App or Pendulum have ads?
Neither Nielsen Mobile App nor Pendulum shows ads.
Which is updated more often, Nielsen Mobile App or Pendulum?
Nielsen Mobile App ships an update every 4 months, and Pendulum every 9 days. Most recently, Nielsen Mobile App was updated on September 20, 2026 and Pendulum on September 10, 2026.

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