Comparison

One Digit Field vs Starchess

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

Head to head
About

One Digit Field

Features
Read full description

One Digit Field is a puzzle game where you put numbers one by one in a 9x9 square while thinking carefully. The rules of the game are very simple, and the goal is to put numbers in all the squares according to the following placement rules. ・ 1 to 9 are lined up in one vertical row ・ 1 to 9 are lined up in a horizontal row ・ 1 to 9 should be placed for each 3x3 block This rule is similar to the puzzle games SUDOKU and Number Place, which are popular all over the world, regardless of age or gender, so you may be familiar with it. As a developer, I also love SUDOKU, and I think it's a perfect game for a short wait, and I enjoy several apps of the same type. One Digit Field is developed with a focus on "playability" and "multiplay". Of course, regarding the quality of the problem, I think we have prepared a so-called "good question". There are 7 difficulty levels, and each level has 200 stages, so we have prepared a total of 1400 stages. Furthermore, you can add 100 stages for 1 dollar by In-App Purchase (Non-Consumable). In addition, there is a daily stage, so you can enjoy it forever. First of all, please enjoy this app, and discover the deep fun of SUDOKU. *The music playing in this app is the music published in "Music Atelier Amacha" (https://amachamusic.chagasi.com). *From version 1.1, the automatic deletion function for digit memos has been added. For example, if you enter "5" at 9 times and use them up, the digit memo of "5" left on the board is unnecessary and annoying, so you had to manually delete them one by one. The automatic deletion function for digit memos deletes digit memos that are no longer needed in such cases. *In-App Purchase Information You can add 100 stages for 1 dollar by In-App Purchase (Non-Consumable). *In-App Purchase Restoration When reinstalling this application, you can restore the above purchase by logging in with the same Apple ID as purchased and tap 'Restore Added Stages' at Setting view. *Notes of In-App Purchase In-app billing will be charged via iTunes account. *Privacy Policy and Terms of Use http://hrathnir.info/index.php/page/iPhoneAppSupport

About

Starchess

Experience chess with a unique twist on a three-dimensional board. Pieces gain new movement capabilities, allowing for strategic plays in up, down, and diagonal directions. Enjoy a fresh challenge to your chess skills.

Highlights
  • Three-dimensional chess board
  • Traditional chess rules
  • Expanded piece movement (up, down, diagonal)
  • Unique strategic gameplay
Read full description

Starchess has all of the same rules as traditional chess but now on a three-dimensional board. Pieces can move up, down and diagonally.

Screenshots

One Digit Field4 screens
Starchess4 screens

Verdict

The call

The clearest difference is in-app purchases: Starchess at none against One Digit Field's 19. Starchess also leads on ads (none vs shown) and device support (4 vs 2). One Digit Field's advantage is update cadence (every 10 days vs every 4 months). On price 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. One Digit Field sells 19 one-off in-app purchases. Starchess asks for nothing beyond the download.

UpkeepUpdate frequency

One Digit Field ships an update every 10 days, Starchess every 4 months. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
One Digit Field versus Starchess: the parameters behind the verdict, then further details
ParameterOne Digit FieldStarchess
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 10 days — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.013.0 — better
Further details — not scored
Size87 MB60 MB
Age rating4+4+
DeveloperTomoyoshi NatsuiNathan Lane

In-app purchases

19 purchases

One Digit Field

One-time19
  • Stages (Hard 00101-00200)$0.99
  • Stages (Very Hard 00101-00200)$0.99
  • Stages (Expert 00101-00200)$0.99
Show 16 more
  • Stages (Beginner 00201-00300)$0.99
  • Stages (Very Easy 00201-00300)$0.99
  • Stages (Easy 00201-00300)$0.99
  • Stages (Normal 00201-00300)$0.99
  • Stages (Very Hard 00201-00300)$0.99
  • Stages (Hard 00201-00300)$0.99
  • Stages (Expert 00201-00300)$0.99
  • Stages (Level1:00301-00400)$0.99
  • Stages (Level2:00301-00400)$0.99
  • Stages (Level3:00301-00400)$0.99
  • Stages (Level4:00301-00400)$0.99
  • Stages (Level5:00301-00400)$0.99
  • Stages (Level6:00301-00400)$0.99
  • Stages (Level7:00301-00400)$0.99
  • Refill 5 Hearts$0.99
  • No Ads & Unlimited Hearts$4.99
None

Starchess

No in-app purchases

Questions

Is One Digit Field free?
One Digit Field is free to download, with in-app purchases available.
Is Starchess free?
Starchess is free to download, with no in-app purchases.
Do One Digit Field or Starchess have ads?
One Digit Field shows ads; Starchess does not.
Which is updated more often, One Digit Field or Starchess?
One Digit Field ships an update every 10 days, and Starchess every 4 months. Most recently, One Digit Field was updated on October 20, 2026 and Starchess on October 13, 2026.

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