Comparison

Gem Mining Robot vs Specimen86

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

Head to head
About

Gem Mining Robot

Features
Read full description

A casual game for a self-propelled robot that specializes in digging gems. It has enough power, and with a powerful laser launcher, it can evaporate clay and move almost unimpeded underground. It also has front and rear cannons that can destroy various monsters underground. But it must be able to fire after digging at least one gem. This robot is not omnipotent. It does not know where the gems are, nor where the monsters are. It needs your operation to complete the task. 1. The direction of advance: You need to indicate the direction of advance for it (by gently swipe to up, down, left or right) 2. When to fire: There are various monsters that can automatically track it, and as long as they touch it, the game will over. Therefore, it is best to shoot the monsters before they approach, and of course the score will be consumed. 3. Do nothing about the stone: it can only go around the stone and move forward. However, for the stone that has no obstacles in front or is at the edge of the tunnel, just push it lightly to break through the obstacles and continue to move forward. Because stones can kill all kinds of monsters, in order to save score, it is best to use stones to kill such monsters. Main operations: 1. Swipe: Slide your finger up, down, left, and right anywhere on the screen to change the direction 2. Tap: Tap the location around the robot to fire. Notes: Internet is must to play this game.

About

Specimen86

Features
Read full description

About the Game You are a new observer at a marine research laboratory. In the lab’s mysterious aquarium, you’ll raise more than just an ordinary fish. What is this egg… really? The being you nurture may become a mermaid, a fishman, or something entirely different. Your choices shape its evolution and story, leading to multiple endings and a shocking truth. Game Features Evolve, Observe, Discover Experience a relaxing idle evolution game where growth paths and endings change based on your actions. Play at your own pace—perfect for short breaks or bedtime relaxation. Multiple Endings Your decisions—feeding, temperature control, conversations, and more—determine the final form. Explore all branching evolutions to uncover every ending. Healing Yet Unsettling Behind the soothing visuals of swimming creatures lies a darker side— research experiments, DNA extraction, and mysterious “bad endings.” A blend of cute and eerie, peaceful and ominous. A Story Worth Exploring Each specimen you raise generates a research report, revealing the hidden meaning behind your actions. For players who love theories, mysteries, and deeper lore, the story invites reinterpretation and replay. Idle Progression Even while the app is closed, time continues. Your specimen quietly prepares for its next stage of evolution. No moment is wasted—research and observation advance naturally. Elements That Affect Evolution There’s no single path to evolution. Affection, water temperature, cleanliness, item usage, and even character interactions— every small choice can open a new future. Experiment repeatedly to reach every form and ending. Collection System All your evolved specimens and research logs are saved. Review your collection to see how your decisions connected to each unique outcome. Piece together the world’s secrets one evolution at a time. What You’ll Experience Calm observation of aquatic life in a glass tank Emotional storytelling as your specimen grows—cute, mysterious, and unsettling moments The comfort of a healing game mixed with the intrigue of a dark fantasy Multiple endings that reward replay and exploration Research reports that reveal how your nurturing influenced the future Your specimen will react to your care, changing expressions and behavior— you might even grow attached to it. Capture those moments and share them via the screenshot & SNS share function. Recommended For Fans of idle growth and aquarium simulation games Players who enjoy healing games with a deeper, mysterious tone Those who love story games and hidden lore People looking for a short, relaxing daily game Players who enjoy cute but eerie, surreal experiences Collectors who love unlocking every evolution and ending Gameplay Flow You’re assigned to an ocean lab, tasked with nurturing a mysterious aquatic specimen. Use laboratory equipment and special items to maintain its environment and reduce stress. Even when left alone, time passes and evolution progresses. Conversations and environmental changes influence the path ahead— each playthrough may lead to an entirely different result. Every completed evolution is archived as a research log you can revisit anytime. Game Overview “Specimen No.86: Choices and the Future” is a new-style simulation that combines idle growth, healing gameplay, branching stories, dark fantasy, and collection elements. A soothing yet unsettling experience that stirs emotion— with multiple endings, including bad ones, your nurturing connects to a larger theme of evolution and destiny. This is more than a simple aquarium game. Dive into the story that drifts between healing and unease, and discover how your choices shape the future.

Screenshots

Gem Mining Robot2 screens
Specimen864 screens

Verdict

The call

The clearest difference is in-app purchases: Specimen86 at none against Gem Mining Robot's 5. Specimen86 also leads on update cadence (every 6 days vs every 5 weeks) and iOS requirement (15.0 vs 17.6). On price, 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

Both are free to download. Gem Mining Robot sells 5 one-off in-app purchases. Specimen86 asks for nothing beyond the download.

UpkeepUpdate frequency

Gem Mining Robot ships an update every 5 weeks, Specimen86 every 6 days. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 3 level
Gem Mining Robot versus Specimen86: the parameters behind the verdict, then further details
ParameterGem Mining RobotSpecimen86
PriceFreeFree
Update frequencyEvery 5 weeksEvery 6 days — better
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, MaciPhone, iPad, iPod — better
Requires iOS17.615.0 — better
Further details — not scored
Size8 MB302 MB
Age rating4+9+
DeveloperAOBO Co.,LtdSAYACHI-MARU GAMES

In-app purchases

5 purchases

Gem Mining Robot

One-time5
  • Level 2$0.99
  • Level 3$0.99
  • Level 4$0.99
Show 2 more
  • Level 5$0.99
  • Level 6$0.99
None

Specimen86

No in-app purchases

Questions

Is Gem Mining Robot free?
Gem Mining Robot is free to download, with in-app purchases available.
Is Specimen86 free?
Specimen86 is free to download, with no in-app purchases.
Do Gem Mining Robot or Specimen86 have ads?
Both Gem Mining Robot and Specimen86 show ads.
Which is updated more often, Gem Mining Robot or Specimen86?
Gem Mining Robot ships an update every 5 weeks, and Specimen86 every 6 days. Most recently, Gem Mining Robot was updated on October 8, 2026 and Specimen86 on October 1, 2026.

Other comparisons