An agency owner signs up for a time tracking tool, points it at a contractor’s laptop or a client’s project, and assumes it will answer whichever question comes up first. Sometimes that question is “is this person actually working.” Sometimes it is “can I send this client a bill they won’t push back on.” Most tools are built to answer one of those questions well and the other not at all, and the product category name, “time tracking,” does not tell you which.
Two tools that both say “time tracking”
There are two different products hiding under the same label. The first is internal productivity or activity monitoring: software built around activity levels, screenshots, and logs of which apps and URLs someone had open during the workday. The second is client billing time tracking: software built around hours logged against a client and project, turned into a rate and then an invoice. Vendors in both categories call what they sell “time tracking,” which is exactly why buyers end up with the wrong one. A tool that measures a worker’s day and a tool that measures a client relationship are not interchangeable just because both produce a timesheet.
followedapp already covered the per-client billing side of time tracking for agencies running social retainers. This piece looks at the other half: monitoring tools bought when the actual need was billing, and billing tools bought when the actual need was monitoring.
What a monitoring tool like Hubstaff or Time Doctor actually ships
Hubstaff’s own site organizes its product into named categories, one labeled “Productivity monitoring software,” described as letting a team “see how work time is spent.” Under that category the site lists employee monitoring, employee activity tracking, time tracking with screenshots, idle time tracking, and app and URL usage, each with its own page (fetched 2026-09-09). The employee-monitoring page describes the feature set as app and URL usage, “optional, privacy-first screenshots,” and activity levels shown in real time.
Time Doctor’s features and pricing pages (fetched 2026-09-09) list activity summary, screenshots, web and app usage reporting, and online/offline tracking on Basic and Standard plans, with add-ons further up for unusual activity detection and video screen recording. Both vendors describe this category the same way: a record of what a person did at their computer during tracked hours.
| Feature (as listed on the vendor’s own page) | Hubstaff | Time Doctor |
|---|---|---|
| Activity levels / activity tracking | Yes, under “Productivity monitoring software” | Yes, “Activity Summary” on Standard plan and above |
| Screenshots | Yes, “Time tracking with screenshots,” configurable | Yes, listed on Basic plan and above |
| App and URL usage | Yes, “App and URL usage” | Yes, “Web & App Usage reporting” on Standard plan |
| Idle time tracking | Yes, named feature | Not named as a standalone feature on the pages fetched |
| Per-client invoicing as a headline monitoring feature | Invoicing exists but sits under a separate “Global payments” category tied to tracked hours and project cost, not marketed alongside the monitoring set | No invoicing or client-billing feature appears anywhere on the features or pricing pages fetched |
What a billing tool like Harvest is built around instead
Harvest’s pricing page (fetched 2026-09-09) is organized around the fields a client invoice needs. The Free plan lists seats, projects, time tracking, invoicing, and expense tracking. The Teams plan adds unlimited seats, team reporting, invoicing, and accounting integrations with Stripe, QuickBooks Online, Xero, and Deel. The Enterprise plan adds profitability reporting by client, project, and task, alongside an activity log documented as reviewing time entries and changes, not activity levels or screenshots. No activity-level or screenshot monitoring feature appears anywhere on the page fetched for this piece.
The contrast is direct once you read both companies’ pages side by side. Hubstaff and Time Doctor organize their marketing around a worker’s day: activity, screenshots, idle time, app usage. Harvest organizes its marketing around a client relationship: seats, projects, rates, invoices. Same category name, two different subjects being measured.
Where the mismatch actually shows up
The mismatch rarely surfaces at signup, because both categories call themselves time tracking and both look like a timesheet. It surfaces later, when the tool is asked to do the job it was never built for.
Picture an agency that already runs a billing tracker like Harvest because it needed clean per-client invoices, and a client starts asking whether a particular contractor is actually putting in the hours being billed. The billing tool has no activity percentage, no screenshot, no app or URL log to point to. It can show that hours were logged against a project. It cannot show what the person was doing during those hours, because that field does not exist on the product.
Now picture the reverse: an agency running a monitoring tool like Hubstaff or Time Doctor because it wanted to know whether a remote contractor was working, and a client asks for a billing breakdown by project for the quarter. The export comes back organized around a worker’s activity timeline, not a client’s project ledger. Pulling a defensible invoice out of it means reconstructing, by hand, a structure the tool was never built to hold. These are the two moments this piece is built around: a client billing audit, where the missing field is invoicing and rate structure, and a team trust issue such as a contractor dispute over hours worked, where the missing field is an activity or screenshot record. Neither shows up as an error message. It shows up as a blank space where the answer was supposed to be.
Tools that try to do both, and where that claim holds up
Hubstaff’s own site is the one of the three that documents something in both directions. Its “Global payments” category lists project cost budgeting and “Invoicing and billing” that turns tracked hours into invoices, sitting next to “Productivity monitoring software” on the same navigation menu (fetched 2026-09-09). What is not documented on the pages fetched is a per-client invoicing workflow marketed as part of the monitoring feature set itself; the two live as separate categories rather than one combined feature.
Time Doctor’s pages, fetched the same day, list no invoicing or client-billing feature at any tier. Harvest’s pricing page, in the other direction, lists no activity-level or screenshot feature at any tier. The overlap claim holds for Hubstaff, and does not hold for Time Doctor or Harvest based on what their own pages currently document. This is not a ranking of the three. It is a record of what each vendor’s own page says it ships.
How to tell which one you actually need before you buy
- If the problem is “I need to send a client a bill they will not question,” check the vendor’s feature page for client fields, project fields, invoicing, and a rate structure. If none appear, the tool is a monitoring tool no matter what it is named.
- If the problem is “I need to know whether this person is working,” check the same page for activity tracking, screenshots, or app and URL logs. If none appear, the tool is a billing tool no matter what it is named.
- Read the feature list before the trial, not after. A free trial answers whether the software runs. It does not answer whether the fields it collects match the question you are trying to answer.
- If both problems need solving, expect to run two tools rather than one, unless a vendor’s page documents both, the way Hubstaff’s does for tracked-hours invoicing alongside monitoring.
- Do not assume a vendor’s product name settles the question. “Time tracking” appears on all three companies’ marketing pages, and it means three different things.
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followedapp tracks what social media tools and adjacent software actually ship, verified against the vendor’s own pages rather than assumed from a product name. followedapp is published by the team behind RecurPost, and RecurPost is covered vendor #34 under the same rules as every other vendor. Vendor pages cited here were fetched and verified on 9 September 2026, not Watchdog data and not on the re-verification schedule.
FAQ
Is Hubstaff meant for billing clients or for monitoring staff?
Hubstaff’s own pages describe activity levels, screenshots, and app and URL logs under “Productivity monitoring software.” A separate “Global payments” category turns tracked hours into invoices, so invoicing exists on Hubstaff’s site, but as a distinct category, not combined with monitoring.
Can Time Doctor produce an invoice a client can review?
No. Time Doctor’s features and pricing pages list activity tracking, screenshots, and app usage reporting, with no client-facing invoicing feature at any tier.
Does a billing tool like Harvest track activity levels or take screenshots?
No. Harvest’s pricing page centers on seats, projects, invoicing, and rates. Its Enterprise tier lists an activity log, described as reviewing time entries and changes, not activity or screenshots.
Why would an agency need both kinds of tool?
They prove different things: a billing tracker proves to a client what was billed, a monitoring tool proves to an owner what was done. A tool built for one rarely documents the other, so covering both means two tools, not one.
What should I check before buying a time tracking tool?
Match the problem to the vendor’s feature page, not the category name. For a client bill, look for client fields, invoicing, and rates. For verifying work, look for activity tracking or screenshots. If neither appears, the tool was not built for that job.
Sources
- Hubstaff, Features, fetched 2026-09-09
- Hubstaff, Employee Monitoring, fetched 2026-09-09
- Time Doctor, Features, fetched 2026-09-09
- Time Doctor, Pricing, fetched 2026-09-09
- Harvest, Pricing, fetched 2026-09-09