CalcLockAt a glance: Compare Maple Labs’ SPV listing with CalcLock’s equation entry, local imports and storage limits.
Identify the exact app first
This comparison concerns SPV – Secret Photo Vault by Maple Labs, App Store ID 1449239240. Similar names can refer to different developers. Check that identity before using a comparison to choose an app.
What the listing describes
SPV’s listing describes PIN-protected photos and videos, albums, password storage, contacts and browser information. CalcLock centers on a working calculator that opens an equation-specific vault, with photo, video and file imports and an audio player. Pick the functions you actually need rather than the longest feature list.
Local storage has a practical consequence
SPV’s description says it uses device storage and warns that deleting the app deletes its saved data. It tells users to export before deletion. CalcLock also requires a careful originals strategy, but its current version does not provide export or a portable recovery path.
CalcLock’s current boundary
CalcLock uses AES-256-GCM for local vault files and its manifest, with a secret held in the device Keychain. It has not had an independent security audit. The current version has no export, sharing, backup restoration, sync or forgotten-equation recovery. Keep independent originals: losing the device or equation can mean losing access.
Check the paid experience separately
SPV is listed as free with in-app purchases and optional recurring subscriptions. CalcLock’s first version is free; this is not a promise that every future version will be free. Review the actual purchase sheet for any paid app instead of relying on a cached comparison price.
About this comparison
Reviewed 11 November 2026. Published by CalcLock, using its documented current implementation and the official source linked below. Competitor capabilities are developer-described, not independently tested here. Features and plans can change. No security ranking or guaranteed outcome is implied.
Questions, answered
Can I assume SPV has a tested working calculator?
The listing uses calculator language, but this comparison did not test its current entry interface. We do not infer an exact unlock workflow from the subtitle alone.