The short answer: before you pay for any AI tool, score it from 0 to 2 on six questions: does it do one specific job for you, can you check its output, is your data safe, does it pay for itself, can you leave, and does it save effort in week three. A tool needs 9 out of 12 to earn a subscription. Everything else can wait or stay on the free plan.
This is educational content, not financial advice. The prices and hours below are assumptions for illustration, so use your own numbers.
Why a scorecard beats a “best AI tools” list
New AI products launch every week, and every list ranks them differently. The tool that is best for a graphic designer is a poor pick for a bookkeeper. What works across jobs is a repeatable way to judge a tool, so you do not have to rely on whoever wrote the latest ranking. This is the method we use on every review at Digital Shake, and you can run it in about 15 minutes per tool.
The six questions
1. Task fit: does it do one specific job you do every week?
Write the job in one sentence, with a number: “Draft the five client emails I send each day” is a task. “Be more productive” is not. Score 2 if the tool handles the job end to end, 1 if it handles part of it, 0 if you would be inventing a use for it. Most people who overspend on AI subscriptions score 0 here and bought on curiosity.
2. Checkability: can you verify the output quickly?
AI tools make confident mistakes. The lower the cost of checking, the safer the tool. A draft email takes seconds to review. A tax figure or a medical claim does not. Score 2 if you can verify the result in under a minute or against a source you trust, 1 if it takes real effort, 0 if a wrong answer would be costly and hard to spot. We cover a quick routine for this in our guide to fact-checking an AI answer in five minutes.
3. Data safety: what happens to what you type?
Read the privacy settings before you paste anything real. Check whether your chats can be used to train the model, whether you can switch that off, and whether a work account has different terms from a personal one. Score 2 if you can opt out and the tool has clear controls, 1 if the policy is vague, 0 if you would have to paste client data, health details or passwords to get value. Our walkthrough of AI chat privacy settings shows where the switches are.
4. Payback: does it earn back its price?
This is simple arithmetic. Take what the subscription costs per month, divide by your hourly value, and you get the hours the tool must save. At $20 a month and a $30 hourly value, it needs to save 40 minutes a month to break even. At $200 a month for a “pro” tier, it must save more than six and a half hours. Score 2 if you clear break-even by at least three times, 1 if you barely clear it, 0 if you cannot name the hours saved. For the full breakdown, see whether ChatGPT Plus is worth it.
5. Exit cost: can you leave without losing your work?
Some tools lock your files, templates and history inside their own format. Others export to plain text, docs or spreadsheets. Check that you can download your data, and prefer monthly billing over an annual plan until you have used the tool for a quarter. Score 2 for easy export and monthly billing, 1 for one of the two, 0 for neither.
6. Week-three effort: does it still save time after the novelty fades?
Every tool feels magical on day one. The real test is whether you still open it on day 21 without forcing yourself. Score it after a three-week trial, not before. 2 if you used it unprompted at least 10 times, 1 if you used it a few times, 0 if you stopped.
A worked example: a freelance writer weighing a $20 plan
| Question | Score | Reasoning |
|---|---|---|
| Task fit | 2 | First drafts and outlines every week |
| Checkability | 1 | Wording is easy to check, facts are not |
| Data safety | 1 | Can opt out of training, but client drafts are sensitive |
| Payback | 2 | Saves about 6 hours a month at $30 an hour, 9 times break-even |
| Exit cost | 2 | Everything lives in her own documents |
| Week-three effort | 2 | Used it on 14 days out of 21 |
| Total | 10 / 12 | Worth paying for, with a rule: no client names in prompts |
The same writer scoring an AI image generator might see 0 for task fit and 1 for payback, a total of 5, so she stays on the free tier or skips it. The scorecard will not say “never pay”. It says what to pay for and what to skip.
Red flags that should end the trial
- It promises income. Any tool that sells “AI income streams” is selling the course, not the tool. Read our piece on AI scams first.
- No way to see or delete your data.
- Annual-only billing on a product that is less than a year old.
- Features that exist only in the demo. If you cannot test the feature during the trial, assume it does not work yet.
- Several tools overlap. If you already pay for one assistant, a second one needs to beat it on a specific job, not in general. Check ChatGPT vs Gemini vs Claude before adding another.
How to use the score
- 10 to 12: pay, monthly, and set a reminder to re-score in 90 days.
- 8 to 9: stay on the free plan. See our list of the best free AI tools. Upgrade only when you hit a limit that costs you time.
- Below 8: skip it. Revisit if your job changes.
If you already pay for several tools, score each one today and cancel the lowest. Our guide to cutting AI subscription costs walks through that cleanup.
Who this is for, and who should skip it
For: anyone paying for, or about to pay for, more than one AI tool, and anyone whose employer lets them choose their own. Skip it if your company already picked and secured a tool for you: the privacy and cost questions are decided, and your job is to use it well.
Our take
The best AI tool is the one you can name a weekly job for, check quickly and cancel easily. Scoring takes 15 minutes and routinely saves a few hundred dollars a year in subscriptions that felt useful but were not. Run it on the tool you pay for today and see what it scores.
This is educational content, not financial advice.