Comparison

Sector vs DiffChar

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

Head to head
About

Sector

Generate and explore detailed star maps for your Sci-Fi RPG campaigns. Features include automatic world generation with UPP data, trade routes, and editable maps. Export maps as PDFs or text listings.

Highlights
  • Automatic sector generation (16 subsectors)
  • Full UPP generation for worlds
  • Random name generation
  • Trade route calculation and display
  • Editable map (add/remove worlds)
  • PDF and text export
  • Import plain text sector listings
Features
Read full description

Sector is a mapping tool for classic tabletop Science Fiction Roleplaying games. With a single click Sector will generate an entire sector (16 subsectors) of worlds for you and your players to explore. • Full UPP (Universal Planetary Profile) generation for every world • Random name generation for all worlds, sectors and subsectors. • Beautiful mapping that shows the mainworld size, atmosphere and surface type at a glance. • Minor and major trade routes calculated and drawn on the map • Clusters, chains and voids are automatically detected and named • Pan and zoom the map with multitouch. Tap a world for more details. Tilt your device to shift the labels and routes slightly. • Tap the map with two fingers to show or hide the navigation and toolbars • Export your map as a beautiful PDF, or as a plain text listing. • Import original plain text sector listings in the standard format. Many classic sectors are even bundles in the app! That's not all - the map is editable! Tap the 'Edit' button and then tap hexes to remove a world you don't want, or add a world to a blank hex. Trade routes and cluster names are generated on the fly. Note: requires the use of an RPG rules system. Contains materials from the Traveller SRD document: http://www.traveller-srd.com Note: Mapping an entire sector is resource intensive. Recommended for iPad Pro and iPhone 6s devices or better.

About

DiffChar

Test your observation skills by finding the unique Chinese character among many that look alike. This game offers over 360 challenges, combining fun with education for a simple yet engaging experience.

Highlights
  • Identify unique Chinese characters
  • Over 360 challenging levels
  • Simple and fun gameplay
  • Educational value
  • Suitable for all ages
Features
Read full description

According to statistics, the number of Chinese characters is more than 80,000, many of them look very similar. The App collects and lists some Chinese characters to see if you can find out the difference. - Find out the different one from Chinese characters! - More than 360 characters for you to challenge. - Simple, fun and educational. Come and take a challenge!

Screenshots

Sector4 screens
DiffChar4 screens

Verdict

The call

The clearest difference is price: DiffChar at Free against Sector's $3.99. DiffChar also leads on rating (5.0 vs 3.8) and iOS requirement (9.0 vs 15.6). Sector's advantage is in-app purchases (none vs 3) and ratings volume (20 vs 1). On update cadence, ads and device support 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

DiffChar is free to download; Sector costs $3.99 up front. DiffChar sells 3 one-off in-app purchases. Sector asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DiffChar holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Sector has 20 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Sector ships an update fortnightly, DiffChar weekly. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 4 level
Sector versus DiffChar: the parameters behind the verdict, then further details
ParameterSectorDiffChar
Price$3.99Free — better
Rating3.8 (20 ratings)5.0 (1 ratings) — better
Positive reviews53.3% of reviews—
Number of ratings20 — better1
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.69.0 — better
Further details — not scored
Size7 MB25 MB
Age rating4+4+
DeveloperTaptix Ltd景灯 梁

Customer experience

Sector

All ratings20 ratings
Positive65.0%
Neutral20.0%
Negative15.0%
Written reviews15 reviews
Positive53.3%
Neutral26.7%
Negative20.0%

DiffChar

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sector

No in-app purchases

3 purchases

DiffChar

One-time3
  • All Characters$0.99
  • Removing balls 10 times$0.99
  • Removing Ads$1.99

Questions

Is Sector free?
Sector costs $3.99, with no in-app purchases.
Is DiffChar free?
DiffChar is free to download, with in-app purchases available.
Which has better reviews, Sector or DiffChar?
DiffChar is rated higher. Sector averages 3.8 out of 5 from 20 ratings, while DiffChar averages 5.0 from 1 ratings.
Do Sector or DiffChar have ads?
Neither Sector nor DiffChar shows ads.
Which is updated more often, Sector or DiffChar?
Sector ships an update fortnightly, and DiffChar weekly. Most recently, Sector was updated on October 3, 2026 and DiffChar on October 7, 2026.

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