# [090] Watch: consumer AI assistants that don't need an app and live in SMS / iMessage / WhatsApp (reminders, scheduling, companionship), subscriptions at $4–12/month > Source: https://stringers.io/en/o/090.html (Stringers / 什么值得做, generated 2026-11-08) > Stringers answers one question every day: what small product can one or two people build in a few months and actually make money from. Numbers come from 15 databases we collect daily, each with source and date. > For agents: these verdicts and the underlying databases (verified revenue, App Store / Google Play charts, ad libraries, GitHub, Product Hunt…) are queryable live over MCP — tools today / hot / products / directions / direction / data. Setup: https://github.com/komako-workshop/stringers (the user logs in at stringers.io → "配置 agent" to get a personal URL). Site index: https://stringers.io/llms.txt > Grouped by store. Each group starts with the charts that can be graphed (real curves, data dates below the chart), then the scanner's original notes and source links. [Home](https://stringers.io/worth/) / [090] # Watching: consumer AI assistants that need no app and live in SMS / iMessage / WhatsApp (reminders, scheduling, companionship), subscriptions $4–12/month Watching Inspiring · Change the carrier (App → messages) First seen 2026-11-05 · Last updated 2026-11-08 Status Watching Confidence Low. ## Evidence Grouped by store. Each group starts with the charts that can be graphed (real curves, data dates below the chart), then the scanner's original notes and source links. ### Meta Ad Library1 evidence items - Meta ad library (cleared the bar: "doubled ad spend"): Caddy.app (landing.caddy.app, Page likes 236) is running 10 (11-02) → 95 (11-05), earliest one seen 2026-07-01. Copy: "A personal AI that lives in your texts," "Tell Caddy what to remember and when. It will text you when it is time," "Snap a flyer and text it to Caddy. It adds the event," "College, Handled By Text" (for students: deadline reminders, drafting replies to emails). Between 11-02 and 11-04 it launched 20 new image and DCO creatives in one go. No indie is tracking it, and its revenue is unknown. ### Indie product revenue (TrustMRR)2 evidence · 5 products with curves [flint](https://trustmrr.com/startup/flint) walkwithflint.com TrustMRR · 30-day revenue $2,682 (-36%) · MRR $1,454 · 133 subscriptions Monthly revenue (verified by payment platform) 2026-07 → 2026-11 (5 pts). Light bars = current month, not yet complete Daily revenue (UTC day) Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above. [Coco](https://trustmrr.com/startup/coco) textcoco.com TrustMRR · 30-day revenue $1,205 (-20%) · MRR $1,616 · 232 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 pts). Light bars = current month, not yet complete Daily revenue (UTC day) Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above. [Parlai](https://trustmrr.com/startup/parlai) parlai.app TrustMRR · 30-day revenue $383 (-33%) · MRR $733 · 77 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 pts). Light bars = current month, not yet complete Daily revenue (UTC day) Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above. [Chat Data](https://trustmrr.com/startup/chat-data-llc) chat-data.com TrustMRR · 30-day revenue $19,485 (+36%) · MRR $17,931 · 309 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 pts). Light bars = current month, not yet complete Daily revenue (UTC day) Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above. [Magnetic Funnels](https://trustmrr.com/startup/magnetic-funnels) magneticfunnels.io TrustMRR · 30-day revenue $11,939 (-9%) · MRR $8,595 · 191 subscriptions Monthly revenue (verified by payment platform) 2025-11 → 2026-11 (13 pts). Light bars = current month, not yet complete Daily revenue (UTC day) Data 2026-09-29 → 2026-11-06 (39 days, 39 observations). Single-day swings are big, so look at the trend in the monthly breakdown above. - Indies (revenue verified by payment platforms, 30 days, as of 11-03): Olly (olly.bot, "an AI agent for every human," founded 2023) $2,317 (+55%), MRR $1,276, 298 subscriptions; Flint (faith companion, lives in iMessage, see [016]) $3,006 (−24%), MRR $1,584; Coco (textcoco.com, personal assistant on WhatsApp / Telegram, $4 / $12 per month) $1,205 (−23%), 233 subscriptions; Parlai (practicing a foreign language on WhatsApp) $366. - For comparison: on the same carriers, B2B makes far more money: Chat Data $19,357, Instagram / WhatsApp AI sales setter (anonymous) $17,621, Magnetic Funnels $13,452. On the consumer side, each one is at $1–3k/month. ## My take The no-download, SMS-based model lowers acquisition friction (the landing page hands you a number directly) and sidesteps App Store cuts. The cost is weak subscription conversion and retention (only a few hundred subscribers, low ARPU). Olly took three years to reach $2k/month. Caddy nearly 10x'd its Meta spend in a single week, which suggests someone has run the unit economics on this channel, but the revenue isn't visible. The part worth watching is "vertical audience + messaging channel": college students (Caddy), churchgoers (Flint), language learners (Parlai). These are easier to pitch than a general-purpose assistant. ## What would upgrade it Caddy's active ad count holds one week later (11-12 recheck); or a consumer messaging assistant on indie charts exceeds $5k over 30 days and is still rising. Downgrade: Caddy drops below 20 ads, Olly turns negative. ## The hardest step The cost and compliance of sending SMS / iMessage (US A2P 10DLC registration, Apple's restrictions on commercial iMessage accounts), and getting users to pay a subscription. ## Who it's for Indie developers who understand a particular niche and can build backends; US market (SMS) or markets where WhatsApp is widely used (Latin America, Europe, India). ## Should every product builder know this? No. ## Change log 2026-11-08 Caddy is spending on 95 → 92 (11-05 → 11-08). After the ramp it's held above 90 ads with no pullback, and it's only a few days away from the upgrade condition (11-12 without a drop). Olly: $2,394 in 30 days. 2026-11-07 Caddy's active ads are still at 11-05 of 95 (not rechecked the last few days); Olly $2,458 over 30 days (+65%, 305 subscriptions). 2026-11-05 First recorded (Meta: Caddy doubled ad spend + indies Olly / Flint / Coco moving the same way). Original: Scanner opportunity library #090 (updated daily, 06:00); this page was generated on the 2026-11-08 edition.