Interpolator vs TLV ToolBox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interpolator
Easily find values within tables using interpolation for two or three rows. This utility app simplifies calculations without needing a separate calculator, making it ideal for various table-based environments.
- Two-row interpolation
- Three-row interpolation
- Table value lookup
- No calculator needed
- Cargo surveyor tool
- General table use
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This is a small app which makes it very easy to look up values in tables (math etc) when you have to interpolate both in two and in three rows. No more need for a calculator to interpolate manually. This app was designed primarily for cargo surveyors working with tank calibration tables, but the app does have its application in any environment where tables are used. As of 13th January 2015, this app has become FREE until further notice.
TLV ToolBox
This utility app transforms your mobile device into a portable steam calculation tool. It assists with onsite calculations for control valve stations, condensate recovery systems, and various maintenance tasks, reducing the need for multiple trips.
- Steam Tables (saturated and superheated)
- Steam Pipe Sizing
- Condensate Pipe Sizing
- Heating Calculations
- Cv and Kv Values
- Stall Point
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Turn your mobile device into a light & portable steam calculation tool with TLV Toolbox. Reduce trips back and forth while working onsite with this valuable tool. Helpful for design or everyday maintenance of control valve stations, condensate recovery systems, and much more! ************************* FEATURES: - Steam Tables (saturated and superheated) - Steam Pipe Sizing - Condensate Pipe Sizing - Heating Calculations - Cv and Kv Values - Stall Point - and more... ************************* * About Us * TLV is internationally established, with companies in 13 countries. A network of over 100 distributors in more than 50 countries enables the speedy provision of engineering support throughout the world. TLV plays a leading role in the promotion of efficient energy systems and increased environmental conservation on a worldwide scale through its original products and services. For further information visit: www.tlv.com Contact us: https://www.tlv.com/global/US/contact-us/contact-form.html
Screenshots
Verdict
The clearest difference is rating: Interpolator at 4.9 against TLV ToolBox's 4.5. Interpolator also leads on ratings volume (74 vs 8). TLV ToolBox's advantage is review sentiment (75% vs 67%) and iOS requirement (9.3 vs 12.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Interpolator holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Interpolator has 74 ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 67% of Interpolator's written reviews are positive against 75% of TLV ToolBox's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 26, 2026 and October 8, 2026 respectively.
| Parameter | Interpolator | TLV ToolBox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (74 ratings) — better | 4.5 (8 ratings) |
| Positive reviews | 66.7% of reviews | 75.0% of reviews — better |
| Number of ratings | 74 — better | 8 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 18 MB | 4 MB |
| Age rating | +4 | 4+ |
| Developer | ron mooring | TLV CO.,LTD. |
Customer experience
Interpolator
TLV ToolBox
In-app purchases
Interpolator
No in-app purchases
TLV ToolBox
No in-app purchases
Questions
Is Interpolator free?
Is TLV ToolBox free?
Which has better reviews, Interpolator or TLV ToolBox?
Do Interpolator or TLV ToolBox have ads?
Which is updated more often, Interpolator or TLV ToolBox?
Other comparisons
