Optmyzr was built by former Google Ads people for agencies that manage a lot of Google spend, and on dayparting specifically it does things Google's own interface cannot. This page gives it that credit and then asks the question a Shopify brand should ask: is Google dayparting your problem, or is it one symptom of a stock problem?
Direct answer: For Google Ads dayparting on its own, Optmyzr is the stronger tool: hour-of-week bid recommendations and a script that gives 24 hourly dayparts where Google allows six. It does not daypart Meta, and it sees Shopify inventory only as an emailed CSV. Ralph recommends Google hours from the same evidence and does not write them, but it dayparts Meta after approval and puts the hour data next to variant stock, which is where a fashion brand's "weak evening" usually comes from. Agencies managing Google at scale: Optmyzr. A Shopify brand whose problem is stock meeting spend: Ralph, and use Google's native schedule by hand.
Side by side
| Optmyzr | Ralph | |
|---|---|---|
| Built for | Agencies and in-house PPC teams | Shopify operators, founder to multi-store |
| Networks | Google, Microsoft, Amazon, Meta, LinkedIn, Yahoo Japan | Meta and Google |
| Google dayparting | Hour-of-week bid adjustments (manual CPC), 24 hourly dayparts by script, minus 90 to plus 900 percent | Recommendation from hour evidence; you apply |
| Meta dayparting | None | Native schedule (lifetime) or stepped throttle (daily), after approval |
| Shopify inventory | CSV by email on higher tiers | Native, per variant, live |
| Feed and stock | Shopping Feed Audit: out-of-stock percentage, availability fixes, smart product labels in a supplemental feed | Cover and core-size per variant, supplemental feed writes after approval |
| Automation model | Rule Engine: apply automatically or notify only | Propose, approve, apply. Writers off by default |
| Pricing (seen September 2026) | By managed spend; from $209 a month per its own compare page; 14-day trial; 30-day money-back | Free £0; £99; £249; £599 a month; private beta |
What Optmyzr gets right
Depth on Google. The hourly dayparts script is the kind of thing only a team that knows the API's limits would build: Google caps a campaign at six schedule blocks a day, so the script rewrites bid modifiers every hour to fake 24. The rule engine's notify-only mode is a grown-up default. The Shopping Feed Audit is a genuinely useful read of Merchant Center health. And it has a decade of agency customers.
What it cannot see
Your warehouse, today. Shopify data arrives as a spreadsheet by email, so the Feed Audit knows an offer is marked out of stock in Merchant Center, but not that the core sizes of a style sold out at 2pm and the offer will flip in an hour. And Meta is a reporting surface for it, not a dayparting one, so the account where most Shopify brands spend most of their money gets no clock.
What Ralph gets right, and does not
Ralph's contribution on Google is modest and stated plainly: it shows the hour-of-week evidence, groups it into retail blocks, and recommends the schedule and bid adjustments. You apply them. Where it earns its place is the stock check next to the clock: the weak evening on Google is, for a size-run brand, very often a shelf problem, and Ralph shows the size run that broke at 3pm alongside the hours. On Meta it goes further: a native schedule on lifetime budgets, a stepped throttle on daily ones, after approval.
It is not a PPC suite. No Microsoft, no Amazon, no LinkedIn, no bid scripts, no 24-slot Google dayparts. If that is what you need, the answer is above.
Optmyzr makes the Google clock more precise than Google allows. Ralph asks whether the clock is the problem. Different tools for different questions.
Using both
Some brands will. Optmyzr for the Google account's structure and hourly bids; Ralph for the stock-to-spend join across Meta and Google and the morning list. They do not conflict, because Ralph does not write Google schedules. The DIY version of Google dayparting, which is free, is in Google Ads dayparting and ad schedules.
Questions people actually ask
Is Optmyzr better than Ralph at Google dayparting?
Yes, on Google alone. Optmyzr's Hour of Week Bid Adjustments recommend hourly bid changes you apply, and its Hourly Campaign Level Dayparts script gives 24 hourly slots where Google allows six, from minus 90 to plus 900 percent. Ralph recommends a Google schedule from the hour evidence and does not write it. If Google dayparting is the whole job, Optmyzr.
Does Optmyzr work with Smart Bidding?
Its own guide says hour-of-week bid adjustments are for manual CPC and that Google will not consider them under automated bidding. That is a Google constraint, not an Optmyzr one, and it applies to every tool including Ralph's recommendations.
Does Optmyzr see Shopify inventory?
Not live. Shopify data reaches Optmyzr as a CSV by email ingestion on higher tiers. Its Shopping Feed Audit reads Merchant Center and shows out-of-stock percentages, which is catalogue-side, not warehouse-side.
Does Optmyzr do Meta dayparting?
Its own list of tools available for Meta does not include dayparting. Ralph does Meta: a native schedule on lifetime budgets or a stepped throttle on daily ones, after approval.
What does Optmyzr cost?
Seen September 2026: tiers by managed spend (Essentials up to $150K a month, Premium up to $500K, Enterprise above), annual 30 percent off, a 14-day trial and a 30-day money-back promise. Its own comparison page says from $209 a month. Ralph is Free, then £99 to £599.
If you want stock, ads and the morning list in one place: that is what we built Ralph for. A growth operator for Shopify, with review before anything ships. Not magic. Fewer tabs. See Ralph · Docs