Life & fun · alternatives · 2026

24 alternatives to Thunderstack

Your privacy-first epic weight loss dashboard

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Thunderstack launched in 2019; newer entries below may have overtaken it.

1
Lifestack▲609
Calendar meets wearables to boost your productivity
2024 · lifestack.ai · its alternatives →
2
Lifestack (Web + AI Scheduler)▲576
First AI calendar to use health data for better productivity
2025 · lifestack.ai · its alternatives →
3
Unstack▲613
The world's fastest free all-in-one website builder
2020 · its alternatives →
4
Temperstack▲413
Enterprise-grade SRE process automation for Dev & SRE teams.
2024 · temperstack.com · its alternatives →
5
WeightHub▲58
Easily synchronize your body weight data between platforms
2019 · its alternatives →
6
BodyState▲309
Energy Tracking for Your Apple Watch
2024 · apps.apple.com · its alternatives →
7
HockeyStack▲91
No-code analytics tool that tracks your visitors actions
2020 · its alternatives →
8
Undiet Tracker▲57
Track your weight loss progress
2020 · its alternatives →
9
Super Nudge Beta▲88
Take a photo and instantly determine if it's healthy or not
2021 · its alternatives →
10
Healthstack.app▲88
Crowdsource your optimal health stack
2023 · its alternatives →
11
BetterTogether-App▲76
Super fun weight loss challenges app with friends and family
2021 · its alternatives →
12
FitTrack Daily
Privacy-first fat-loss tracking, 100% in your browser
Mar 2026 · ashutosh8127.github.io · its alternatives →
13
EZmeal private calorie app▲40
Keeps your diet and health data safe on your device
2024 · its alternatives →
14
SweatStack▲5
The sports data platform for developers
Dec 2025 · sweatstack.no · its alternatives →
15
easy 10K▲16
Minimalist, privacy‑first tracker for your 10 K daily steps
2025 · apps.apple.com · its alternatives →
16
OWNyourTRACK▲16
Your track it! You own it!
2025 · its alternatives →
17
PrivacyStack▲5
Privacy-first boilerplate for shipping free web tools
Jan 2026 · privacystack.app · its alternatives →
18
Easy Fast Intermittent Fasting Tracker▲16
Made by someone who actually fasts. 100% free.
2024 · easyfastapp.com · its alternatives →
19
Activiews▲10
Map your workouts beautifully
2025 · apps.apple.com · its alternatives →
20
FocusStack▲19
Easiest way to understand, improve and protect your focus
Jun 2026 · usefocusstack.com · its alternatives →
21IB
I built a privacy-first period tracker but it seems nobody cares▲10
There’s something quietly unsettling about how normal it's become to hand over our most personal data to apps that barely deserve our trust. My wife once showed me a notification she got from her period tracking app. At first, it seemed like a simple reminder. But then came the ads. Not long after, she started getting eerily specific suggestions on other platforms. Things she hadn’t searched for. Things that felt too close. Somewhere, her cycle had been turned into a data point. That bothered me more than I can explain. These apps promise helpful insights. But in return, they take so much.…
2025 · its alternatives →
22
Faye - Free Privacy-first Period Tracker▲20
Track your menstrual cycle with accuracy and total privacy
2025 · faye.health · its alternatives →
23
ActivTrak▲13
Track everything you do on computer and block distractions
2019 · its alternatives →
24
Statlytic – Privacy-First Analytics▲9
Ditch Google Analytics – Go Cookie-Free & Privacy-First
Sep 2025 · statlytic.app · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →