Appworthy
App Store
Version 2.5.1 · 2025-05-14
Bug fix Thank you for using Duo Number! If you have any questions, please feel free to email us, and we would love to hear from you: [email protected].
App Store rating4.6★385 ratings
PriceFreeIn-app $0.99–$7.99
Age12+Store age rating
Size114 MBiPhone download
CategorySocial
DeveloperJUSI PTE.LTD.
What we found
Full reportToo little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Money
- Free to download · in-app purchases $0.99–$7.99 (10 listed, the most the App Store shows). Weekly plans $0.99 (about $51 a year), $1.99 (about $103 a year) and $3.99 (about $207 a year); monthly plans $1.99 (about $24 a year), $3.99 (about $48 a year) and $7.99 (about $96 a year). The other purchases’ names don’t say how often they bill.
- If you subscribe through the store, cancel in iPhone Settings → your name → Subscriptions. Deleting the app doesn’t cancel a subscription.
Not yet tested.
The store currently lists version 2.5.1, updated 2025-05-14.
Preview
Store screenshots supplied by the developer.
About this app
Duo Phone Number, a private 2nd Phone number app, is a calling and texting app that allows you to make calls and send text messages globally. It is also a phone number app without a traditional registration process.
It also provides multiple phone numbers as a sideline on your smartphone to let you call and text for personal use and work separately.
Key features:
*Get a phone number and make free phone calls and send free texts with credits now
*Cost-efficient global calls to over 200 countries and regions
*Local phone numbers for you to choose: US, CA, UK
*Great call quality, HD voice over cellular data & wifi
*Caller ID enabled
*Two-way SMS/MMS enabled
- Why Duo Phone Number *
- REAL PHONE NUMBERS
Get a 2nd private phone number to protect your very own number.…
From the developer’s store description.
For developers and the curious
The full report
The evidence, sources, measurements and versions behind every label above.
Findings and evidence
Not yet tested. No analysis has been published for this app. A missing label is not a clean bill of health.
What reviewers report
No review analysis published for this app.
Measurements
“Not assessed” means we could not measure it. It is never a zero and never a pass.
From store data and reviews
Developer replies to reviews
Not assessed
Fewer than 50 reviews scanned — too few to state a rate
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description says how to cancel
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
80–89% five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.
In the app package we scanned
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.
Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Versions and dates analysed
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
Store update history
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Assessment record
- Status
- Not yet tested
- App identifier
duo-phone-number- Sources used
- None recorded
- Reviews read
- None recorded
- Package examined
- No package scan
- Human inspection
- Not completed
How we know
- Measurement vocabulary
- 1.4
Store facts
What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
App Store
- Store rating
- 4.61 ★ · 385 ratings
- Version
- 2.5.1
- Updated
- 14 May 2025
- Price
- Free · In-app purchases
- Age rating
- 12+
- Size
- 114 MB
- Developer
- JUSI PTE.LTD.
- Category
- Social
- Listing price
- Free · In-app purchases
Purchases the store lists
What this app sells
From the store listing. Billing terms are read from each purchase’s name — the stores don’t publish them — so treat them as a strong hint, not a disclosure.
Subscriptions6
Premium WeekWeekly$3.99
Basic WeekWeekly$0.99
Premium WeekWeekly$1.99
Premium MonthMonthly$7.99
Basic MonthMonthly$1.99
Premium MonthMonthly$3.99
Show 4 more purchases we couldn’t categorise
These are really on sale; we just can’t tell from the name whether they recur.
DuoPhone 1Number + FreeCreditsTerm not stated$5.99
DuoPhone 1Number + FreeCreditsTerm not stated$2.99
Credit 100Term not stated$1.99
Credit 500Term not stated$7.99
This list is cut off. Apple shows at most 10 in-app purchases, and this app is at the limit — so it very likely sells more than we can see.
Method and limits
What a missing label means
Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
Limits of this report
- A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
- Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
- Not assessed is a state. It is never a zero and never a pass.
- A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review gives an app hands-on, recorded measurements. None has been run for this app. Hands-on inspections are not yet open.
Request a correction
Write to [email protected], or use the form. Name the finding, the app version and the evidence that needs correcting. Factual corrections are free and never depend on buying anything.