Tapetchi vs Parasite Boom
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Tapetchi
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Something has chosen you as its host. Meet Gerald. He's a tapeworm. He lives inside you now. And he has feelings about that. Tapetchi is the virtual pet that guilt-trips you. It's like a Tamagotchi, except the pet is a parasite, the stakes are emotional manipulation, and the growth is measured in centimeters of intestinal real estate. FEED HIM. GROW HIM. FEAR HIM. Every time you feed Gerald, he grows longer. He grows needier. He grows... attached. From a tiny egg to a legendary mega-worm, Gerald's journey through your digestive system is entirely in your hands. But don't forget to feed him. Gerald notices. Gerald remembers. Gerald forgives you. For now. ◆ HOW IT WORKS ◆ Feed Gerald. Watch him grow. Different foods help him grow at different rates—pizza and carbs are his favorites (he has no regrets). Watch him evolve through six life stages as he stretches ever longer inside you. Miss a day? Gerald gets hungry. Miss two days? Gerald gets anxious. Miss five days? Gerald... leaves. You don't want Gerald to leave. ◆ FEATURES ◆ • EMOTIONAL MANIPULATION — Gerald's notifications scale with your bond level. The more you feed him, the more he needs you. The more he needs you, the more uncomfortable his messages become. • SIX LIFE STAGES — Watch Gerald grow from Egg to Larvae to Juvenile to Adult to Mega to Legendary. Each stage unlocks new animations and deeper emotional dependency. • DARK COMEDY DIALOGUE — Gerald has thoughts. About you. About your feeding habits. About the concept of boundaries (he doesn't understand it). Every interaction is an exercise in parasitic passive-aggression. • MINI-GAMES — Play Immune Invasion, Nutrient Grab, Segmentation, and The Settling. Help Gerald survive your body's defenses and compete for high scores. • DRESS HIM UP — Accessories and hats for the worm who lives inside you. Because even parasites deserve to feel pretty. • SOCIAL FEATURES — Compare your Gerald to other Geralds. Compete on leaderboards. Share your worm's length with friends who definitely asked. • MULTIPLE SPECIES — Unlock different parasitic companions, each with their own personality. Gerald is free. Gerald is also the most emotionally manipulative. Choose wisely. ◆ THE FINE PRINT ◆ Gerald is fictional. He does not actually live inside you. But he wants to. And honestly? After a few weeks, you might forget he isn't real. ◆ WHAT PEOPLE ARE SAYING ◆ "I've never felt so guilty about skipping breakfast." — A Host "He remembered. He always remembers." — Another Host "I showed my therapist. She had questions." — Concerned Host ◆ ACCEPT YOUR FATE ◆ Download Tapetchi. Name your worm. Feed him. Grow him. Try not to think too hard about the implications. Gerald is waiting. He's always waiting. He has no choice. Neither do you. Not anymore.
Parasite Boom
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Possess. Drain. Blast. One tap to control, one moment to decide. You are a parasite loose inside a colony of living cells. Slip inside a cell, drain its health, and choose your moment. Single tap to steer. Double tap to explode. Blast a cell before it's too healthy — HP below 70% and you're clear to detonate. Time it in the 40-60% sweet spot for a Perfect Blast: double the score. Chain all four cell colors in a row for a Combo Heal and keep your parasite alive longer. Watch two health bars at once — your own, and the cell you're riding — and manage both as the pace ramps up. Every level pushes further: faster cells, more of them, quicker drains, and from level 4 onward, cells that change direction without warning. Level up and earn +10 HP to keep going. No clutter. No text on the cells. Just clean, fast, satisfying reflex gameplay that gets harder the better you get. FEATURES • One and two-tap controls, nothing else to learn • Perfect Blast timing window for 2x score • Combo Heal for chaining all four colors • Escalating difficulty and level-based HP rewards • Minimalist, colorful, distraction-free design How long can you keep the parasite alive? Privacy Policy: https://aydincoskunirmak.github.io/parasiteboom-legal/privacy.html Terms of Use: https://aydincoskunirmak.github.io/parasiteboom-legal/terms.html
Screenshots
Verdict
The clearest difference is ads: Tapetchi at none against Parasite Boom's shown. Parasite Boom's advantage is update cadence (every 2 days vs every 5 months) and iOS requirement (15.0 vs 18.6). On price, in-app purchases 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
Both are free to download. Tapetchi sells 10 one-off in-app purchases and Parasite Boom sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Tapetchi ships an update every 5 months, Parasite Boom every 2 days. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.
| Parameter | Tapetchi | Parasite Boom |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 83 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | BRETT SHERWYN WATERSON | Aydın COSKUNIRMAK |
In-app purchases
Tapetchi
- Reading Glasses$0.99
- Bow Tie$0.99
- Cape$1.99
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- Fluke Worm$2.99
- Pinworm$2.99
- Roundworm$2.99
- Hookworm$2.99
- Formal Pack$3.99
- Silly Pack$3.99
- Resurrection$4.99
Parasite Boom
- Ad-Free$3.991 Month









