Appworthy

Sumaddle

Logical number puzzle game

Jonathan Buchanan
Download on theApp Store
App Store rating4.9★769 ratings
PriceFreeIn-app $0.99–$9.99
Age4+Store age rating
Size32 MBiPhone download
CategoryGames
DeveloperJonathan Buchanan

What we found

Full report

Too 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–$9.99 (10 listed, the most the App Store shows). The store doesn’t say how often these 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 3.1.0, updated 2026-10-16.

Preview

Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6

Store screenshots supplied by the developer.

About this app

This type of logical puzzle was first seen in the Japan Puzzle Championship 2006 and is sometimes known as Doppelblock, or Smashed Sums. When played with pencil and paper, these puzzles can be hard work to solve. Sumaddle changes that by transforming the puzzles into interactive brain teasers that unfold before your eyes.

Each puzzle has a unique solution. Finding the solution involves fitting the number combinations to the clues. The app makes it easy to view the possible combinations, you don’t need to do any sums in your head. Instead, you are able to focus on using logic to narrow down the combinations and find a fitting arrangement.

The puzzles come in a range of sizes and difficulties, to suit all levels of skill and puzzling purposes.…

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
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 coverage

No review analysis published for this app.

Measurements

4 measured · 4 not assessed

“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
Replies to fewer than 1 review in 20
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
90% or more 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

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.

App Store

Version 3.1.0 · 2026-10-16
All set for iPhone Duo! This version features comprehensive support for iPhone Duo, along with some other small changes. The changes in detail: • The different displays and fold states of an iPhone Duo are supported in all orientations. • When running with iOS 26 or later, overlay popups now have the close button in the top-left corner, instead of the top-right corner. This is in accordance with Apple’s Human Interface Guidelines. • The sections of the introduction are now navigated by selecting from a menu. The older styling with tabs is still used when running with iOS 17 and 18. • The Game Center access point is no longer shown on the main menu page.

Assessment record

Status
Not yet tested
App identifier
sumaddle
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

App Store

What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.

App Store

Store rating
4.90 ★ · 769 ratings
Version
3.1.0
Updated
16 Oct 2026
Price
Free · In-app purchases
Age rating
4+
Size
32 MB
Open in App Store
Developer
Jonathan Buchanan
Category
Games
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.

One-off packs9
Tricky, Pack 1Pack$0.99
Sneaky, Pack 1Pack$0.99
Tricky, Pack 2Pack$0.99
Crafty, Pack 1Pack$0.99
Tricky, Pack 3Pack$0.99
Sneaky, Pack 2Pack$0.99
Sneaky, Pack 3Pack$0.99
Crafty, Pack 2Pack$0.99
Crafty, Pack 3Pack$0.99
Show 1 more purchase we couldn’t categorise

These are really on sale; we just can’t tell from the name whether they recur.

Puzzle GeneratorTerm not stated$9.99
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 this report can and cannot show

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.
Review thresholds Read the methodology For developers

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