Premium Bonds Calculator Enhancement icon

Premium Bonds Calculator Enhancement

by Internet Janitor · pbprizes.com · Tools
FeaturedEstablished publisherManifest V3 Free
View in Chrome Web Store Data as of 19 Oct 2026

Adds premium bonds calculator and statistics to NS&I website

Users
5
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#253K
#212K among extensions
Version
1.2.1
updated 15 Feb 2026

Users

monthly, 11 months
036Nov 2025May 2026Oct 2026
Latest, 19 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 11 months
001Nov 2025May 2026Oct 2026
Latest, 19 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Premium Bonds Calculator Enhancement

Premium Bonds calculator and statistics overlay, which automatically appears when visiting the NS&I webpages relating to Premium Bonds. Displays data such as 'median annual return', 'median interest rate', 'expected wins', and 'monthly win probability', all dependant on the financial figure entered into the calculator. The tool runs locally and no data is collect or sent to any servers.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days−1−16.7%00.00
6 months+4+400.0%00.00

Chrome Web Store search rankings

Where Premium Bonds Calculator Enhancement appears when people search the store, with the 30 day change
Search phrasePosition30 days
premium#83+6

Version history

2 versions recorded
1.2.115 Feb 2026
1.2.015 Nov 2025

Details

Category
Tools
First seen
15 Nov 2025
Size
23 KB
Languages
en-GB
Pricing
Free
Privacy policy
pbprizes.com
Extension ID
hkpdpbohcdimeanodjifloehhgjiamli

Permissions and risk

Low riskimpact 2, likelihood 1
Site access
https://*.nsandi.com/*

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