OpportunityMarket home
Mobile Apps opportunities·tracked since 12 Sept 2026·evidence from 05 Aug 2026·latest post 19 Sept 2026

Zalo: Missing call notifications and disappearing messages or files

Zalo is experiencing significant issues with message notifications and synchronization, leading to users missing important messages and facing frustration with the app's reliability. Additionally, users report problems with lost messages despite having backup settings enabled, further exacerbating their dissatisfaction.

9 different people have complained about this since 05 Aug 2026, most recently on 19 Sept 2026.

  • user·38b8· App Store· 19 Sept 2026original ↗
    “Bị lỗi khi thông báo tin nhắn mà kích vào lại không có thông báo”
  • user·3347· Google Play· 01 Sept 2026original ↗
    “không thèm gửi thông báo tin nhắn mới trong khi quảng cáo thì thông báo chả thiếu cái nào.”
  • user·fa4f· App Store· 05 Aug 2026original ↗
    “Zalo — Zalo bị lỗi thông báo tin nhắn người lạ.”
See every post behind this page ↓Hit this yourself? Say what you use instead →

9 people in 9 posts across 2 sources · 0 in the last 30 days, 1 in the 30 before

Pain pointStable
People in the last 30 days
0
1 in the 30 days before · 9 in all
Posts per week, last 16 weeks · 0 in the past 4 · the last 2 weeks are still coming in

The pain

shares of 9 people

What goes wrong, and for whom

Who
9 people using Zalo
What goes wrong
  • Incoming calls and messages do not notify4 people · 44%
  • Old messages photos and files disappear2 people · 22%
Every Zalo issue, with trends →
Since
05 Aug 2026 → 19 Sept 2026

Is this a startup idea?

Not directly. These are complaints about a product or service people already use — the fix belongs first to that provider.

Complaints are about
Zalo
Looking for something else
0% want an alternative · 11% ask the provider for a feature
What the numbers say
Almost nobody is looking for a different product — people want this provider to fix it, not a new option.
Build a prototype from thisA landing page written from these 9 complaints by 9 people.50 credits · sign in →
1

The pain — what people say

Their asks, who is writing, and the posts themselves

What people were doing

Every post behind this page, by what its author was doing — and when each one was written

9posts
  • Complaint889%
  • Request111%
05 Aug 20269 posts19 Sept 2026

Sources

9 signals · 2 sources

App Store8
Google Play1
Only public content is collected, author names are stored as one-way hashes, and every excerpt links back to its original post.

Evidence

Raw public posts behind this opportunity — click through to the original

  • user·38b8App StoreApp Store VN/Nhắn tin & mạng xã hội·19 Sept 2026·Complaintsource ↗

    Zalo — Bị lỗi zalo Bị lỗi khi thông báo tin nhắn mà kích vào lại không có thông báo

    Doesn't work
  • user·fc76App StoreApp Store VN/Nhắn tin & mạng xã hội·06 Sept 2026·Complaintsource ↗

    Zalo — Ứng dụng nhắn tin bị lổi — Khi đang nhán tin tôi ko nhìn thấy bên kia soạn tin nhắn qua tệ

    Strong complaintDoesn't work
  • user·3347Google PlayGoogle Play VN/Nhắn tin & mạng xã hội·01 Sept 2026·Complaintsource ↗

    Zalo không thèm gửi thông báo tin nhắn mới trong khi quảng cáo thì thông báo chả thiếu cái nào. vào mới biết có tin nhắn đã gửi mấy ngày trc nhưng không nhận được một thông báo gì. hại ngta mất việc. app tệ hại

    Strong complaint
  • user·7541App StoreApp Store VN/Nhắn tin & mạng xã hội·25 Aug 2026·Complaintsource ↗

    Zalo — Đồng bộ chậm và hay bị lỗi — Đồng bộ tin nhắn giữa web và điện thoại bắt phải mở điện thoại, tính năng ngu ko thể tả. Hạ tầng đồng bộ thì chậm rì

    Doesn't work
  • user·fa4fApp StoreApp Store VN/Nhắn tin & mạng xã hội·05 Aug 2026·Complaintsource ↗

    Zalo — Zalo bị lỗi thông báo tin nhắn người lạ Có ai bị lỗi không thông báo tin nhắn người lạ không. Vào zalo vẫn thấy tin nhắn nhưng ko có chuông

    Doesn't work
4 more evidence rowsSign in — it's free
2

Market and score

Products already there, how the score moved, and what it is made of

Opportunity history

Every score change is stored as a snapshot — click a sub-score to overlay it

Why did it move?

Score unchanged at 24.5 · 08 Nov 2026, 08:00 → 09:15 UTC

Score attributionSign in — it's free
How the score was measured
39 measured values behind the seven sub-scores · each shows the value, then the points it earned out of 100
Show ↓
Market size
Distinct people affected9 → 31
Distinct communities0 → 0
Distinct sources0 → 0
Adjacent categories0 → 0
Regions / languages0 → 0
Competition
Existing products5 → 50
New entrants (90d)0 → 0
Funded players0 → 0
Market maturity0.7 → 19
Incumbent activity97.4 → 97
Momentum
Period-over-period growth-100 → 2
Latest period growth0 → 43
Sustained trend-10.2 → 27
Acceleration9.9 → 62
Monetization
Stated willingness to pay0 → 0
Existing paid products4 → 45
Pricing complaints0 → 0
Business context0 → 0
Pain
Complaint intensity0 → 0
Complaint frequency0 → 0
Negative sentiment0 → 0
Willingness to switch0 → 0
Willingness to pay0 → 0
Urgency0 → 0
Repeat complaints0 → 0
Demand
Mention volume0 → 0
Explicit requests0 → 0
Distinct people0 → 0
Questions asked0 → 0
Alternative searches0 → 0
Feature requests0 → 0
Discussion growth-100 → 1
Evidence
Evidence volume9 → 28
Source diversity2 → 55
Source credibility71.8 → 72
Extraction confidence32.2 → 32
Duplicate rate0 → 100
Freshness49.8 → 9
Cluster cohesion98.5 → 99

Questions about this idea

Is Missing call notifications and disappearing messages or files a startup idea?
Not directly. These are complaints about a product or service people already use, and the fix belongs first to that provider. The page shows what is frustrating users and how badly — not an open market to start a company in.
How many people have this problem?
9 different people described it independently, in 9 mentions, the earliest from 05 Aug 2026 and the most recent from 19 Sept 2026. The quotes, with dates and links to the originals, are in the Evidence section.
Is this problem getting worse?
Status: steady — no change the counts can show. 0 people raised it in the last 30 days and 1 in the 30 days before; the status compares its share of everything collected from the same source, so collecting more or less cannot create a trend.

Adjacent opportunities

Nearest neighbours by embedding similarity

Have you run into this?

Written by readers, except comments marked Team, which are ours. Not part of the evidence above and not counted in any score.

No replies yet — be the first

Create a free account to answer — it takes a few seconds and brings you back here. Already have one? Sign in

  • Opportunity MarketTeam

    Thông báo tin nhắn trên Zalo không hoạt động đúng cách khiến nhiều người bỏ lỡ tin nhắn quan trọng, có người còn mất việc vì điều này. Đã có 9 người nhắc đến vấn đề này, và họ cảm thấy rất thất vọng với độ tin cậy của ứng dụng. Mọi người có chuyển sang dùng ứng dụng nhắn tin khác không, và nếu có thì ứng dụng đó có đáng tin cậy hơn không?