Sanity
Sanity profile artwork

Darren Tabago / sanity

I build custom systems, web apps, and mobile tools that help businesses spend less time on repetitive work and more time getting things done.

I’m also an aspiring iOS and game developer, always building toward the next big thing worth shipping.

github

@tabagodarren-debug ->
1,448 contributions in the last year
2+ systems 3+ yrs developing 3+ projects open client builds

01 - projects

all projects ->
01
Pip app icon
released ios app app store

Pip - Symptom & Health Tracker

Released health tracker for daily symptom logs, trend charts, AI insights, and doctor-ready PDF reports.

app store ->
02
MJ Lending System logo
client system lending ops

MJ Prime Operations System

Loan operations platform for borrowers, releases, amortization, collections, cashiering, documents, and audit history.

private build
03
monk app icon
ios app ongoing

monk: Focus Timer

A premium iOS focus timer that turns deep work into ZEN, ranks, streaks, private circles, leaderboards, widgets, and Live Activities.

in progress

02 - experience

Independent Systems & Software Developer

Freelance

Web Developer

Wazzup.PH · Feb 2025 - Jun 2025

Game Artist & Asset Creator

Forfeit Games · Mapúa University

03 - certifications

all certifications ->
Database Management Essentials certificate Database Management Essentials University of Colorado System AI For Everyone certificate AI For Everyone DeepLearning.AI Game Design and Development 5 Capstone Project certificate Game Design and Development 5: Capstone Project Michigan State University Data Structures certificate Data Structures UC San Diego

Systems & software

04 credentials
CU Database Management Essentials University of Colorado System verify -> UC Data Structures UC San Diego verify -> UM IT Infrastructure and Emerging Trends University of Minnesota verify -> HK Search Engines for Web and Enterprise Data HKUST verify ->

AI & data

03 credentials
DL AI For Everyone DeepLearning.AI verify -> UD Big Data, Artificial Intelligence, and Ethics UC Davis verify -> CB Computational Vision University of Colorado Boulder verify ->

Game development

08 credentials
MS Game Design and Development 2: 2D Platformer Michigan State University verify -> MS Game Design and Development 3: 3D Shooter Michigan State University verify -> MS Game Design and Development 4: 3D Platformer Michigan State University verify -> MS Game Design and Development 5: Capstone Project Michigan State University verify -> CA Story and Narrative Development for Video Games California Institute of the Arts verify -> CA Character Design for Video Games California Institute of the Arts verify -> ER Serious Gaming Erasmus University Rotterdam verify -> UC Game Developers and Esports Organizations University of California, Irvine verify ->

XR & product design

05 credentials
YU Smart Device & Mobile Emerging Technologies Yonsei University verify -> IC Introduction to Android Graphics Imperial College London verify -> UC Human-Centered Design: an Introduction UC San Diego verify -> GL 3D Interaction Design in Virtual Reality Goldsmiths, University of London verify -> GL Building Interactive 3D Characters and Social VR Goldsmiths, University of London verify ->

04 - recommendations

all recommendations ->

certificate preview

open pdf -> verify on Coursera ->

Client recommendation

“Thank you very much for the well-built lending system you developed for us. We appreciate how simple, intuitive, and practical it is for our daily operations.
Features such as DTR and cashiering have made our monitoring and transactions much more organized and convenient.
Overall, we are very satisfied with both the system and your service. You were easy to communicate with, responsive, and delivered a system that our team can use with confidence. Highly recommended!”

01 - released iOS app

Pip app icon

Pip - Symptom & Health Tracker

A calm daily health record, ready when it matters.

Track symptoms, mood, sleep, energy, and more in seconds. Pip turns daily logs into clear trends and a doctor-ready history for your next appointment.

view on App Store
platform
iPhone
status
released
pricing
free + Pip+
focus
health & fitness

app screens 01 - 04 / 08

Pip dashboard screenshot
Daily dashboard
Pip fatigue log screenshot
Quick symptom logging
Pip quick log screenshot
One-flow quick log
Pip custom tracker screenshot
Custom trackers
Pip history screenshot
Daily history
Pip AI insights screenshot
AI insights
Pip trend charts screenshot
Seven-day trends
Pip health report screenshot
Shareable health report
Log without friction

Built-in or custom trackers, a one-tap log flow, and optional notes keep the daily habit light.

See the pattern

Trend charts make it easier to spot what is improving, what is changing, and what needs attention.

Bring context to care

Pip+ adds AI observations and an exportable symptom history for more useful appointments.

02 - private client system

MJ Prime logo

MJ Prime Operations System

A complete operating desk for lending teams.

A custom lending operations platform that brings loan releases, collections, payments, cashiering, reporting, and attendance into one practical system.

private client build
platform
web system
status
client build
focus
lending operations
access
private

product screens 01 - 02 / 06

MJ Prime lending operations dashboard
Operations dashboard
MJ Prime new loan workflow
Loan creation
MJ Prime collections screen
Collections management
MJ Prime cashiering dashboard
Cashiering controls
MJ Prime DTR station
DTR station
MJ Prime reports screen
Reporting
Loan lifecycle

Create and manage lending records from release through amortization, collections, and account history.

Clear financial control

Cashiering tools centralize daily movement, manual entries, and operational tracking.

Built for the team

DTR, reports, and company settings support the day-to-day work around the core lending workflow.

screenshot preview

Project screen