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©Yumbo 2026

Guide

Yumbo gamification

How heroes, skills, loot and battles turn healthy eating into a game you keep coming back to.

Aug 18, 202520 min read

The goal of Yumbo is to make you consciously aware of your nutritional health through steady engagement. That's a hard challenge, because people tend to drop off after a day, a week, or a month. For digital health apps, about 20% of users are still around after 1 day, 8% after a week, and 4% after a month12.

When it comes to your long-term health, persistence is critical, and research shows that gamifying digital health has a positive impact3.

Design

Yumbo's gamification is a turn-based RPG. The loot and itemization are inspired by Diablo II, and the crafting system by Path of Exile.

The gamification is still unfinished. The art, skills, sounds and mechanics are incomplete, missing, or placeholders.

Heroes

There are 6 hero classes, each with 3 skill trees of 10 skills:

  • 🥼NutritionistCasterMacro bolts, vitamin armor, and the label that exposes every enemy.
  • 🍳Iron ChefBruiserCast iron and open flame. Outlasts and punishes.
  • 🏹ForagerRangedArrows, wild poisons and weather. Strikes from cover.
  • 🔪Sous ChefRogueFast blades, flambe and perfect timing. Fragile, never idle.
  • 🫙FermenterAttritionLiving cultures and cold cellars. Wins the long fight.
  • 🔥PitmasterBurnerFire and smoke, then feasts on what it burns.

Each class has 3 skill trees. When you level up, you gain +1 skill, +1 passive, and +5 attribute points. Below is the Pitmaster's Pit Fire skill tree. (The passive tree isn't implemented yet.)

At the top of the skill tree is your active skill bar. You can bring up to 5 skills into each battle.

Pit FireLv 30
10skill points
🌶️
1
🔥
0
🔥
1
🔥
1
🔥
1
🧱
1
🧂
🔒
💥
1
🌶️
0
🍾
🔒

Default skills

The skills your hero starts every battle with. In a fight you can still pick any other skill you've learned.

Character attributes

Each attribute, Strength (str), Dexterity (dex), Vitality (vit), and Intelligence (int), enhances your character's abilities. Some gear has a minimum str/dex/int requirement.

Each class benefits differently from the attributes. For example, an Iron Chef gets more life per vit and a Nutritionist gains more mana per int.

mrs_doubtfire

Pitmaster
Level30
20,342 XP20,342 XP for level 31

Attributes

150 points to spend
  • Muscle
    +0.4% critical hit damage per point
    Perfect Bite damage 4.4%
    11
    5 base
  • Agility
    +0.1% critical hit chance per point
    Perfect Bite chance 1%
    12
    6 base
  • Vitality
    +3 health per point
    Total health 261
    11
    5 base
  • Focus
    +2 mana per point
    Total mana 105
    31
    5 base

Hold Shift for +5, ⌘ for +10, both for all.

Damage sheet
Base
Items
Passives
Total
Spice damage
0
0
0
0
Spice damage %
0%
10%
0%
10%
Fiber damage
0
0
0
0
Fiber damage %
0%
10%
0%
10%
Energy damage
0
0
0
0
Energy damage %
0%
10%
0%
10%
Junk damage
0
0
0
0
Junk damage %
0%
10%
0%
10%
Protein damage
0
0
0
0
Protein damage %
0%
10%
0%
10%
Recipe Power %
0%
10%
0%
10%
Perfect Bite Chance %
0%
1%
0%
1%
Perfect Bite Bonus %
2%
2%
0%
4%
Damage over Time %
0%
0%
0%
0%
Skill Duration (turns)
0
0
0
0
Ailment Effect %
0%
0%
0%
0%
Ailment Buildup %
0%
0%
0%
0%
Ailment Duration (turns)
0
0
0
0
Ailment Threshold
16
49
0
65
Threshold % %
0%
0%
0%
0%
Defence sheet
Base
Items
Passives
Total
Survivability
Health
65
196
0
261
Health regen
0
3
0
3
Gut Health (armor)
0
190
0
190
Quickness (evasion)
0
0
0
0
Guard (block chance) (max 40%)
0%
0%
0%
0%
Resource
Focus
30
75
0
105
Focus regen
0
2
0
2
Tolerances
Spice tolerance (max 75%)
0%
23%
0%
23%
Fiber tolerance (max 75%)
0%
37%
0%
37%
Caffeine tolerance (max 75%)
0%
18%
0%
18%
Junk tolerance (max 75%)
0%
18%
0%
18%
Toughness (protein) (max 75%)
0%
0%
0%
0%
Ailments
Ailment Threshold
16
49
0
65
Threshold %
0%
0%
0%
0%

Tip

  • Shift + click assigns 5 points at a time.
  • Command/Windows + click assigns 10 points at a time.
  • Shift + Command/Windows + click assigns all remaining points.

Loot

What makes these RPGs fun, and keeps players coming back, is randomized loot. Yumbo is no different. There are a few ways to get loot:

  • Complete blog quests that have 📦 in their rewards
  • Defeat a boss in battle (more below)
  • Buy it at the Market with gold
  • Trade with other players (coming soon)

There are 10 different item slots.

mrs_doubtfire

Level 30 Pitmaster

Items come in 4 rarities: Normal, Magic, Rare, and Unique. Unique items have predetermined stats, while the rest are randomly generated. Normal items have 1 affix, Magic have 2, and Rare have 3.

You can upgrade (or craft) any non-Unique item up to 6 affixes with currency items:

NOTE: you can click on the tooltip to toggle to detailed view.

1) Drag the Receipt onto the Gloves and release to identify it.
1
1
1
1

Omens

Battle

Fight from the /battle board. Pick an unlocked node, choose your spells, and defeat the boss for experience and loot. You can find your loot in the /market.

Quest

9gold3 📦30 XP

Answer all 5 questions to earn the reward.

1 of 5Which two games did Yumbo take inspiration from?

References

  1. 1.sendbird.com https://sendbird.com/blog/app-retention-benchmarks-broken-down-by-industry
  2. 2.researchgate.net https://www.researchgate.net/publication/341504304_A_systematic_review_and_meta-analysis_of_rates_of_attrition_and_dropout_in_app-based_interventions_for_chronic_disease_Preprint
  3. 3.pmc.ncbi.nlm.nih.gov https://pmc.ncbi.nlm.nih.gov/articles/PMC6096297/

Quest

9gold3 📦30 XP

Answer all 5 questions to earn the reward.

1 of 5Which two games did Yumbo take inspiration from?

Settings
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...
©Yumbo 2026

Guide

Yumbo gamification

How heroes, skills, loot and battles turn healthy eating into a game you keep coming back to.

Aug 18, 202520 min read

The goal of Yumbo is to make you consciously aware of your nutritional health through steady engagement. That's a hard challenge, because people tend to drop off after a day, a week, or a month. For digital health apps, about 20% of users are still around after 1 day, 8% after a week, and 4% after a month12.

When it comes to your long-term health, persistence is critical, and research shows that gamifying digital health has a positive impact3.

Design

Yumbo's gamification is a turn-based RPG. The loot and itemization are inspired by Diablo II, and the crafting system by Path of Exile.

The gamification is still unfinished. The art, skills, sounds and mechanics are incomplete, missing, or placeholders.

Heroes

There are 6 hero classes, each with 3 skill trees of 10 skills:

  • 🥼NutritionistCasterMacro bolts, vitamin armor, and the label that exposes every enemy.
  • 🍳Iron ChefBruiserCast iron and open flame. Outlasts and punishes.
  • 🏹ForagerRangedArrows, wild poisons and weather. Strikes from cover.
  • 🔪Sous ChefRogueFast blades, flambe and perfect timing. Fragile, never idle.
  • 🫙FermenterAttritionLiving cultures and cold cellars. Wins the long fight.
  • 🔥PitmasterBurnerFire and smoke, then feasts on what it burns.

Each class has 3 skill trees. When you level up, you gain +1 skill, +1 passive, and +5 attribute points. Below is the Pitmaster's Pit Fire skill tree. (The passive tree isn't implemented yet.)

At the top of the skill tree is your active skill bar. You can bring up to 5 skills into each battle.

Pit FireLv 30
10skill points
🌶️
1
🔥
0
🔥
1
🔥
1
🔥
1
🧱
1
🧂
🔒
💥
1
🌶️
0
🍾
🔒

Default skills

The skills your hero starts every battle with. In a fight you can still pick any other skill you've learned.

Character attributes

Each attribute, Strength (str), Dexterity (dex), Vitality (vit), and Intelligence (int), enhances your character's abilities. Some gear has a minimum str/dex/int requirement.

Each class benefits differently from the attributes. For example, an Iron Chef gets more life per vit and a Nutritionist gains more mana per int.

mrs_doubtfire

Pitmaster
Level30
20,342 XP20,342 XP for level 31

Attributes

150 points to spend
  • Muscle
    +0.4% critical hit damage per point
    Perfect Bite damage 4.4%
    11
    5 base
  • Agility
    +0.1% critical hit chance per point
    Perfect Bite chance 1%
    12
    6 base
  • Vitality
    +3 health per point
    Total health 261
    11
    5 base
  • Focus
    +2 mana per point
    Total mana 105
    31
    5 base

Hold Shift for +5, ⌘ for +10, both for all.

Damage sheet
Base
Items
Passives
Total
Spice damage
0
0
0
0
Spice damage %
0%
10%
0%
10%
Fiber damage
0
0
0
0
Fiber damage %
0%
10%
0%
10%
Energy damage
0
0
0
0
Energy damage %
0%
10%
0%
10%
Junk damage
0
0
0
0
Junk damage %
0%
10%
0%
10%
Protein damage
0
0
0
0
Protein damage %
0%
10%
0%
10%
Recipe Power %
0%
10%
0%
10%
Perfect Bite Chance %
0%
1%
0%
1%
Perfect Bite Bonus %
2%
2%
0%
4%
Damage over Time %
0%
0%
0%
0%
Skill Duration (turns)
0
0
0
0
Ailment Effect %
0%
0%
0%
0%
Ailment Buildup %
0%
0%
0%
0%
Ailment Duration (turns)
0
0
0
0
Ailment Threshold
16
49
0
65
Threshold % %
0%
0%
0%
0%
Defence sheet
Base
Items
Passives
Total
Survivability
Health
65
196
0
261
Health regen
0
3
0
3
Gut Health (armor)
0
190
0
190
Quickness (evasion)
0
0
0
0
Guard (block chance) (max 40%)
0%
0%
0%
0%
Resource
Focus
30
75
0
105
Focus regen
0
2
0
2
Tolerances
Spice tolerance (max 75%)
0%
23%
0%
23%
Fiber tolerance (max 75%)
0%
37%
0%
37%
Caffeine tolerance (max 75%)
0%
18%
0%
18%
Junk tolerance (max 75%)
0%
18%
0%
18%
Toughness (protein) (max 75%)
0%
0%
0%
0%
Ailments
Ailment Threshold
16
49
0
65
Threshold %
0%
0%
0%
0%

Tip

  • Shift + click assigns 5 points at a time.
  • Command/Windows + click assigns 10 points at a time.
  • Shift + Command/Windows + click assigns all remaining points.

Loot

What makes these RPGs fun, and keeps players coming back, is randomized loot. Yumbo is no different. There are a few ways to get loot:

  • Complete blog quests that have 📦 in their rewards
  • Defeat a boss in battle (more below)
  • Buy it at the Market with gold
  • Trade with other players (coming soon)

There are 10 different item slots.

mrs_doubtfire

Level 30 Pitmaster

Items come in 4 rarities: Normal, Magic, Rare, and Unique. Unique items have predetermined stats, while the rest are randomly generated. Normal items have 1 affix, Magic have 2, and Rare have 3.

You can upgrade (or craft) any non-Unique item up to 6 affixes with currency items:

NOTE: you can click on the tooltip to toggle to detailed view.

1) Drag the Receipt onto the Gloves and release to identify it.
1
1
1
1

Omens

Battle

Fight from the /battle board. Pick an unlocked node, choose your spells, and defeat the boss for experience and loot. You can find your loot in the /market.

Quest

9gold3 📦30 XP

Answer all 5 questions to earn the reward.

1 of 5Which two games did Yumbo take inspiration from?

References

  1. 1.sendbird.com https://sendbird.com/blog/app-retention-benchmarks-broken-down-by-industry
  2. 2.researchgate.net https://www.researchgate.net/publication/341504304_A_systematic_review_and_meta-analysis_of_rates_of_attrition_and_dropout_in_app-based_interventions_for_chronic_disease_Preprint
  3. 3.pmc.ncbi.nlm.nih.gov https://pmc.ncbi.nlm.nih.gov/articles/PMC6096297/

Quest

9gold3 📦30 XP

Answer all 5 questions to earn the reward.

1 of 5Which two games did Yumbo take inspiration from?

Manage your appearance, notifications, and account preferences.

General
RIPRIP
2027

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Manage your appearance, notifications, and account preferences.

General
RIPRIP
2027