Threwline vs MacroFactor
AI coach over text vs adaptive TDEE tracker
MacroFactor is an evidence-based nutrition tracker from the stronger by science team, known for an adaptive tdee algorithm that recalibrates your calorie target weekly from your weight and intake data. Threwline is an AI fitness coach that lives in your text messages — no app to download, no wearable required. This page walks through the tradeoffs so you can figure out which one fits you.
At a glance
| Threwline | MacroFactor | |
|---|---|---|
| Interface | Text messages (SMS or Telegram) | iOS / Android app |
| Logging | Natural language — "had a chicken wrap" | Verified food database search or barcode |
| Calorie targets | Mifflin-St Jeor + coach reviews your trend weekly | Adaptive algorithm recalibrates weekly from weight + intake |
| Coaching | AI coach with memory, flags patterns, nudges | Algorithmic recommendations, no conversation |
| Photo logging | Plates and labels | Barcode only |
| Price | $12 founder / $39 pro | $12/mo or $72/yr |
| Best for | Accountability + coaching layer | Self-directed, data-driven tracking |
Pricing: $12/mo or $72/yr, 14-day free trial, no free tier.
Where MacroFactor wins
- Adaptive TDEE algorithm is genuinely excellent — recalibrates weekly from your real weight and intake data, solving the 'the calculator got my TDEE wrong' problem.
- Curated, verified food database maintained by paid staff — far fewer junk entries than crowdsourced databases.
- Built by the Stronger By Science team — real evidence-based credibility in the fitness community.
- Great data export, weigh-in streaks, and workout-program integrations for power users.
Where Threwline wins
- No app — logging a meal is as fast as sending a text.
- Conversational coaching: your AI coach remembers context, asks follow-ups, and calls out patterns. MacroFactor is a tracker, not a coach.
- Natural-language logging beats database search for speed — just type what you ate.
- Photo logging for plates and labels, not just barcodes.
- Same $12/mo founder price, but you get coaching on top of tracking.
Who should use which
MacroFactor is the right call if you're self-directed, love data, and want the gold standard for adaptive TDEE tracking — you'll happily weigh in daily and let the algorithm do its thing. Threwline is the right call if you've tried apps like MacroFactor before and the consistency didn't stick, or if you want a coach that actually talks to you, notices when you're drifting, and adjusts based on conversation rather than pure numbers.
No card required. Text START to +1 (512) 737-7110 or sign up on the web.
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