e vs Unitify Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e
This scientific calculator supports engineering notation with prefixes like pico, nano, and mega. It offers a history feature to review past calculations and allows editing of formulas for recalculation. The free version has some limitations on history scrolling and saving.
- Scientific notation support
- Engineering multipliers (p, n, u, m, k, M)
- History of past calculations
- Editable formulas for recalculation
- Unit conversion for engineering prefixes
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This calculator can be used not only in scientific notation(e.g. 1E-6) but also using engineering multipliers(e.g. p,n,u,m,k,M). By pressing the [ENG] button, the display of calculation result will change. (e.g. 1E-9 or 1n) Calculation results in the past is displayed in the history area. When you tap the formula area , you will be able to edit it. You will be able to re-calculate. Unit that can be entered from the button is p = 1E-12, n = 1E-9, u = 1E-6, m = 1E-3, k = 1E3, M = 1E6. (f = 1E-15 and G = 1E9 is used for display only）. iPhone4 can display four lines in history area. iPhone5 can display 9 lines. The main limitations of Free version is as follows. you can not scroll history area. History is not saved when you exit.
Unitify Converter
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Convert units easier than ever before. Just choose initial conversion unit and enter amount. Press Convert and that would be it. Easy isn't it?
Screenshots
Verdict
The clearest difference is update cadence: e at every 5 months against Unitify Converter's every 22 months. e also leads on iOS requirement (6.1 vs 17.6). On price, ads, in-app purchases and device support 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.
e ships an update every 5 months, Unitify Converter every 22 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | e | Unitify Converter |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 6.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | e-skett Corp. | Omer Rahmanovic |
In-app purchases
e
No in-app purchases
Unitify Converter
No in-app purchases
