PromptSpend for iPhone and Android
The same catalog, the same sources and dates, built for a phone. The apps are free, with no account, no ads and no advertising identifier.
On a computer? Point your phone’s camera at the code for your phone.
What it does
- Forecast a conversation. Paste sample text or enter known token counts, choose your traffic, and see the cost per conversation, day, month and year.
- Compare up to four models side by side, ranked, with the monthly difference from the lowest-cost option.
- See what moves the number: input, output, prompt-cache writes, long-context tiers, reasoning assumptions, batch discounts and conversation growth.
- Prices with evidence. The same public catalog as this site, showing when each source was checked and flagging disagreements for review.
- Optional price alerts by email, without creating an account.
- Share the result as a readable estimate, a four-model comparison, a CSV or an Estimate Receipt — built from counts and costs, never your pasted text.
Private by design
Text you paste is processed on your phone and is not uploaded or saved by PromptSpend. There is no account, advertising SDK, advertising identifier or cross-app tracking. The app counts which screens are opened, how long it is used and a few actions through Google Analytics, never your text, and you can switch that off in the app. The random installation code the update check carries is not read, logged or stored. The details are in the privacy policy.
Rather use the browser?
Nothing to install: the PromptSpend calculator runs the same estimates in any browser.
The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.