Idea Ranking & Portfolio Decision¶
Date: 2026-11-10
Revised: 2026-11-10 — rescored after discovering ZiMINDEX, ZWPRICE, DotCompare, and ZimSeek. See 00-method/market-context.md §5.
Ideas under evaluation: 5 (from ideas.md)
Monetisation inputs: monetise.md
1. The rubric¶
Six criteria, weighted by what actually determines survival at pre-revenue stage. Weights are opinionated and stated so they can be argued with.
| # | Criterion | Weight | Why this weight |
|---|---|---|---|
| C1 | Pain severity & frequency | 20% | An app only survives if the pain recurs. One-off pain produces one-off usage. |
| C2 | Market size & growth | 15% | Matters, but a large market you can't reach is worth less than a small one you can. |
| C3 | Willingness & ability to pay | 20% | Equal to pain. The graveyard is full of free apps that solved real problems. |
| C4 | Competition & defensibility | 15% | White space is a signal and a warning. We score both. |
| C5 | Solo-buildability / time to MVP | 15% | With 1–2 builders, an idea that takes 9 months dies at month 3. |
| C6 | Distribution reachability | 15% | The binding constraint in Zimbabwe is not code, it's attention. |
Scale: 1–10 per criterion. Weighted score out of 10.
2. Scores¶
| Idea | C1 Pain (20%) | C2 Market (15%) | C3 Pay (20%) | C4 Comp (15%) | C5 Build (15%) | C6 Dist (15%) | Score | Rank |
|---|---|---|---|---|---|---|---|---|
| 2. Car Care | 8 | 9 | 7 | 8 | 8 | 7 | 7.80 | 1 |
| 3. House Manager | 6 | 9 | 4 | 3 | 9 | 6 | 6.05 | 2 |
| 4. Price Finder | 7 | 8 | 5 | 2 | 5 | 8 | 5.85 | 3 |
| 5. Kombi / Transport | 9 | 10 | 3 | 4 | 2 | 4 | 5.40 | 4 |
| 1. ZESA / Water / Daily Life | 3 | 9 | 3 | 2 | 5 | 8 | 4.80 | 5 |
(Scores 1–10. Formula: Σ(score × weight). Full workings in §6.)
What changed in this revision¶
| Idea | Change | Reason |
|---|---|---|
| Car Care | C4: 9 → 8 (7.95 → 7.80) | ZWPRICE is a credible adjacent entrant into the garage-lead mechanic. Its examples already include service requests ("a plumber in Chinhoyi this week"), so extending to "a mechanic in Harare this week" is a small step. The record-and-reminder half remains uncontested. |
| Price Finder | C4: 4 → 2 (6.15 → 5.85) | ZiMINDEX alone ships four of the five features I designed as differentiators, executed better than a v1 could be. Add DotCompare, zimpricecheck, shopzim, ZimSeek, zimqoute — six active players. |
| Price Finder | Rank 2 → 3 | Now scores below House Manager. The category is not merely occupied; it is well-served. |
| Others | Unchanged | No new information found |
The build decision is unchanged. Car Care still wins, and the gap to second place is still large (1.75 points). What changed is that Car Care's margin is now honest rather than flattering, and the price-index idea has moved from "second best" to "a feature, not a company" — which is where the detailed analysis already put it.
3. The verdicts¶
#1 — Car Care. BUILD THIS.¶
Score 7.80 (down from 7.95 — see the ZWPRICE caveat below). The only idea that scores well on every axis without a disqualifying weakness.
- Pain is recurring and externally enforced. ZINARA licence, insurance, and service intervals all have hard dates. The user doesn't need to remember to care — the state and the odometer do it for them.
- The market is the strongest in the set. 1.52M registered vehicles, growing 44.7% in five years, adding 120,000+ per year.
- The supply side can pay. 94% of Harare's ~155 repair businesses are single-owner. They have no CRM, no customer database, and a desperate need for repeat customers. That's the B2B revenue line.
- Genuine white space. No Zimbabwe-specific car care product found. The global apps (MyAutoLog, WhenService) are iCloud-synced, US-centric, and don't know what ZINARA is.
- The business model is now validated by analogue. ZWPRICE proves that supplier-paid, buyer-free quote marketplaces operate in Zimbabwe across 26 supplier brands. The mechanic Mota depends on is not speculative.
- Buildable by one person. No real-time tracking, no fleet hardware, no field data collection. It's CRUD plus a date engine.
- Founder-market fit is real. The author already owns the problem (a Nissan Note with a CVT), which is the single best predictor of getting the details right.
The caveat that cost it 0.15 points: ZWPRICE is a credible adjacent entrant into the lead-generation half. Its current examples already include service requests ("a plumber in Chinhoyi this week"), so "a mechanic in Harare this week" is not a leap. What protects Mota is that ZWPRICE is a quotation marketplace with no vehicle record, no maintenance intervals, and no reason for an owner to return. The record is the moat; the lead is the revenue. ZWPRICE could take the revenue layer without touching the moat — which is a real risk, and worth naming.
Two other honest risks:
- White space may mean the market doesn't pay. Global generic apps are free, and Zimbabwean consumers have low tolerance for paid apps. This is why the model must be consumer-free + garage-paid, not freemium-first.
- ZiMINDEX already indexes statutory fees as priced line items (traffic fines, with the S.I. reference). Extending that to ZINARA licensing and insurance renewal is a small step for a team that already has the data model. It would not give them the service record, but it would let them own the deadline-and-cost half — which is the half that generates the reminder.
See 01-car-care/11-business-model.md and 12-risk-register.md R-04.
#2 — House Manager. Park it. It's a feature, not a company.¶
Score 6.05. High market size and the easiest thing to build — and that's exactly the problem.
The competition isn't another app, it's WhatsApp plus a shared note. AnyList, OurGroceries, Spondle, and NestSync are free, polished, and already solve shared lists and household budgets. A Zimbabwean couple with a shared WhatsApp group and a notebook has a working system. To beat it we'd need to be meaningfully 10× better, and "a nicer shopping list" is not 10× better.
The willingness-to-pay score of 4 is the killer. The app's own stated benefit — "couples fight less about money and housework" — is a benefit people don't pay for directly. The monetise.md freemium model (US$1/month) on top of free global alternatives is a coin-flip at best.
Note on its promotion to rank 2: this is the only idea that moved up without changing score. It rose because Price Finder fell. That is not a positive signal about House Manager — it is a reminder that ranking is relative, and second place in a weak field is still a weak field.
Revival trigger: if the Car Care product reaches 2,000+ active Harare households, a household module becomes a credible retention feature (same account, same payment relationship). Not before. Full memo: 03-parked/house-manager.md.
#3 — Price Finder. The category is occupied. Absorb the mechanic only.¶
Score 5.85 (down from 6.15). Scores well on pain and reach, badly on defensibility and buildability — and the defensibility score has now collapsed to 2.
The first pass found two competitors. There are at least six:
| Player | What they do |
|---|---|
| ZiMINDEX | The serious one. Cost-of-living intelligence: product price database with per-unit normalisation and multi-shop ranges, family baskets, electricity and rent calculators, provincial inflation, poverty lines, crowdsourced contribution, ZIMSTAT-sourced. |
| DotCompare | "Zimbabwe's live price intelligence" — fuel, USD/ZiG rates, groceries, data bundles, utilities, updated daily |
| zimpricecheck.com | Supermarket, fuel, and service prices; updating continuously |
| shopzim.co.zw | Crowdsourced Harare grocery prices with community confirmation |
| ZimSeek | Market prices and seller listings, web and WhatsApp |
| zimqoute.co.zw | Grocery price calculator and basket quoting |
ZiMINDEX alone ships four of the five things I designed as differentiators — per-price staleness dates, multi-supplier ranges, crowdsourced contribution, and per-unit normalisation — and it does so with data provenance and a macro dashboard I would not have built in v1. It is not a competitor to out-execute. It is a competitor to stay out of the way of.
The Cloudflare outage is not an opportunity. The site is returning Worker exceeded resource limits on several routes. That means it is exceeding free-tier worker limits — which means real traffic. Building on the thesis "the incumbent is down" is not a strategy; it is a bet on someone else's failure to scale, and they will fix it.
Decision: Don't build a price finder, grocery or otherwise. Take the RFQ mechanic — which ZWPRICE has now proven works in this market — and apply it to car parts and labour inside Mota, where the data is volunteered by garages who want to be found rather than collected by field agents.
Full memo: 02-price-index/README.md.
#4 — Kombi / Transport. Structurally the best market, operationally the worst fit.¶
Score 5.40. Highest pain (9) and largest population (10) of any idea — and the lowest buildability (2).
Real-time kombi tracking requires every vehicle to run a device with a data connection, which means either hardware (capital) or driver smartphones (incentive problem — drivers are cash businesses with thin margins and no reason to share location). Add association politics, route licensing, and a market where Hwindi, Whindy, and ZimTap are already moving.
This is a capital-and-ground-game business. It is the right idea for a company with funding and a fleet-ops team. It is the wrong idea for 1–2 builders with no capital.
Revival trigger: only with either (a) a kombi-association partnership already in hand, or (b) a funded team. Full memo: 03-parked/kombi-transport.md.
#5 — ZESA / Water / Daily Life. The premise expired.¶
Score 4.80. This idea was the strongest on the list in 2023. It is now the weakest, for a reason none of us controlled.
Load-shedding has been absent for 304 consecutive days as of 28 October 2026. ZESA claims 138 days clean in May, and is targeting a full year by ~27 December 2026. The government is exporting surplus power to the regional grid. Power is being restored, not cut. An app whose core promise is "power going off in 30 minutes" is solving a problem that has, for now, stopped happening.
Compounding this: ZETDC ships an official load-shedding app on Google Play, with authoritative data we could never match. We would be a worse-informed copy of the incumbent.
Do not build this. The water half remains a real problem but is a different product with weak monetisation. Revival trigger is a documented return of scheduled load-shedding sustained for 60+ days. Full memo: 03-parked/zesa-water-daily-life.md.
4. Portfolio decision¶
The ranking produces a clear sequence. This is the part that matters more than the scores.
Months 0–6 CAR CARE v1 Consumer app, free. ZINARA/insurance/service reminders + fuel log.
Goal: 1,000 activated users, prove retention.
Months 4–8 GARAGE SIDE Partner console. Free for founding garages.
(parallel) Goal: 15 partner garages, prove supply-side engagement.
Months 6–12 MONETISE (a) Garage leads / subscription (b) Parts & labour price index
Goal: US$300–800 MRR, prove someone pays.
Months 12–18 EXPAND Either household module (if Car Care retains) or
transport (only if funded/partnered). Not both.
Never (v1) ZESA app. Premise expired, incumbent owns the data.
The strategic logic: Car Care is the wedge, the garage network is the moat, and the parts price index is what makes the moat deepen over time. Every additional garage makes the price data better, which makes the consumer product better, which attracts more garages. That's a real flywheel. A grocery price app has no equivalent loop.
5. What would change this ranking¶
Stated up front so the ranking can be falsified rather than defended.
| Trigger | Effect |
|---|---|
| Load-shedding returns for 60+ consecutive days | Reopens idea #1 — but ZETDC's official app still caps the ceiling at "small ad business", not a company |
| Car Care fails to reach 300 activated users in 90 days | The white space really does mean nobody cares. Fall back to House Manager as a lower-ambition lifestyle business |
| A funded competitor launches a Zimbabwe car care app | Re-evaluate; our defensibility rests on garage relationships, not features — accelerate the garage side |
| ZWPRICE adds an automotive service category | New. Immediately halves our revenue line before we have it. Response: compete on the record, not the lead — ZWPRICE has no maintenance history and no reminder engine |
| ZiMINDEX adds ZINARA/insurance renewal pricing | New. Takes the deadline-and-cost half. Response: the service record is still ours, but the reminder becomes their surface. Accelerate the interval engine |
| ZiMINDEX fixes its Cloudflare limits and expands into vehicles | New. Lowest-probability, highest-impact. Watch their /products category list quarterly |
| Grocery price competitor shuts down / stalls | Does not reopen idea #4 standalone. Six players exist; one exiting leaves five, and ZiMINDEX's data depth is not replicable cheaply |
| A kombi association offers a data partnership | Reopens idea #5 — that's the only condition that makes it buildable |
| Payment rails change (direct EcoCash access lowers cost) | Improves all economics marginally; does not change ranking |
6. Score workings¶
#2 Car Care = 8(.20) + 9(.15) + 7(.20) + 8(.15) + 8(.15) + 7(.15) = 1.60 + 1.35 + 1.40 + 1.20 + 1.20 + 1.05 = 7.80
#3 House Manager = 6(.20) + 9(.15) + 4(.20) + 3(.15) + 9(.15) + 6(.15) = 1.20 + 1.35 + 0.80 + 0.45 + 1.35 + 0.90 = 6.05
#4 Price Finder = 7(.20) + 8(.15) + 5(.20) + 2(.15) + 5(.15) + 8(.15) = 1.40 + 1.20 + 1.00 + 0.30 + 0.75 + 1.20 = 5.85
#5 Kombi = 9(.20) + 10(.15) + 3(.20) + 4(.15) + 2(.15) + 4(.15) = 1.80 + 1.50 + 0.60 + 0.60 + 0.30 + 0.60 = 5.40
#1 ZESA / Water = 3(.20) + 9(.15) + 3(.20) + 2(.15) + 5(.15) + 8(.15) = 0.60 + 1.35 + 0.60 + 0.30 + 0.75 + 1.20 = 4.80
7. Note on the original advice¶
ideas.md concluded: "I'd start with #2 or #3."
The ranking agrees on #2 and disagrees on #3. The reasoning in ideas.md for #3 was founder-market fit ("you'd test it with your wife"). That's real, but it's a validation speed advantage, not a business advantage. Founder-market fit gets you a good v1; it doesn't get you revenue.
The stronger version of that argument is: start with #2 because the author already owns the pain, and the market data (1.52M vehicles, 94% unsoftwareed supply side) independently confirms it. Two independent signals pointing the same way beats one.
monetise.md concluded: commission and lead fees are where the real money is. The ranking agrees and that's exactly why Car Care wins — it's the idea with a natural, high-intent lead-generation moment ("your CVT service is due" → "here are 3 garages" → "garage pays $3"). House Manager has no equivalent moment.
A note on the second revision. The discovery of ZiMINDEX and ZWPRICE did not change the answer, but it changed the confidence in two directions:
- Down: Car Care is less isolated than it looked. Two credible players could take its revenue layer or its deadline layer respectively, without ever building a vehicle record.
- Up: the business model is no longer a hypothesis. ZWPRICE operating a supplier-paid, buyer-free quote marketplace in Zimbabwe is direct evidence that this commercial shape works here.
Net effect: the idea is slightly weaker, the model is much stronger, and the plan is unchanged. That's a good outcome from a piece of research — most research either confirms everything or invalidates everything.